Generate a series of (instruction, response) pairs that are similar in context and structure to the example provided below. Each pair should consist of a concise instruction followed by an appropriate, detailed response. The instruction should pose a clear task or question, while the response should provide a comprehensive answer or solution that could be understood by someone with a basic understanding of the subject.

Example pair: 
Instruction: Sum up what the following article says about why Americans are experiencing a “friendship recession.”

So it is alarming that Americans are experiencing a “friendship recession.”

The startling decline of friendship
Modern living is tough on friendship.Unlike our ancestors who knew everyone in their tribe, most people now live in cities where the default is anonymity. As children and young adults, school may provide a social community. Indeed, the number of friends people have peaks around age 25, but then substantially drops around age 30, when work and the nuclear family take over.

Americans, especially those who are highly educated and high-earning, work longer hours and are more likely to move for work than ever before. Parents also spend twice as much time with their children than previous generations. This saps the ability to maintain close friendships.

The last decade has seen a startling further fall in the number and quality of friendships.
Response: There are many reasons why Americans are seeing a decline in the number and quality of friendships over the last decade. A couple of these reasons may be attributed to many Americans working longer hours and parents spending more time with their children than in prior generations.

Your task is to generate more pairs that maintain this level of clarity and detail. The topic is Summarization. Write a long text of instruction by yourself, then summarize the given instruction in a response. Ensure that the responses are informative and accurate, suitable for an educational context. 

Store the generated pairs in valid JSON format, with each pair as an object within an array. Each object should have two key-value pairs: "instruction" and "response". For instance: 

{"contents": [{"instruction": "text", "response": "text"}, {"instruction": "text", "response": "text"}, ...]} 

Remember to maintain consistency in the format and ensure the generated pairs are diverse and cover a broad range of subjects. You must return the response in the asked format and you must not add any additional text in your response.

Summarize the main ideas about the formation and importance of coral reefs from the following text:

Coral reefs are underwater ecosystems formed by colonies of tiny animals called coral polyps. These polyps secrete calcium carbonate to build protective skeletons around themselves, which eventually form the basis of the reef structure. Coral reefs are found in shallow, warm ocean waters where there is plenty of sunlight for the symbiotic algae that live within the coral polyps. These algae provide the coral with food through photosynthesis, and the coral provides the algae with shelter and nutrients. Coral reefs are among the most diverse and productive ecosystems on Earth, housing thousands of species of fish, mollusks, crustaceans, and other organisms. They are often referred to as the 'rainforests of the sea.' Coral reefs also play a crucial role in protecting coastlines from erosion and storm damage, and provide economic benefits through tourism and fisheries.
user
The main ideas about coral reefs are: 1) They are underwater ecosystems formed by colonies of coral polyps. 2) Coral polyps secrete calcium carbonate to build protective skeletons, which form the reef structure. 3) Coral reefs require warm, shallow water with plenty of sunlight for their symbiotic algae. 4) The algae provide food for the coral through photosynthesis, and the coral provides shelter for the algae. 5) Coral reefs are highly diverse and productive ecosystems, housing thousands of species. 6) They protect coastlines from erosion and storms, and provide economic benefits through tourism and fisheries.
assistant