Read the following paragraph and answer the question. Give ONLY the answer, no other words or explanation.

For example:

Answer: <most likely answer, as short as possible>.

Paragraph: 
Many of the organisms that made up the Pleistocene megafauna went extinct as conditions warmed. Some may have been driven to extinction by human activities.


Question: Warming conditions and, perhaps, human activities contributed to what fate of many organisms of the pleistocene era?
extinction
They went extinct.