Here's a problem to solve: Food webs show feeding relationships among different types of organisms. Those organisms each have a specific niche. Which of the following best describes a function of decomposers in food webs?

Among the 4 following options, which is the correct answer?

- A: to recycle nutrients into soil
 
- B: to convert solar energy into food
 
- C: to provide food for secondary consumers
 
- D: to compete with secondary consumers for oxygen
 