Explain the central difference between main details and supporting details of a piece of writing.

The difference is simple. A supporting detail is supporting your statement or claim. The main detail is something supporting or explaining your supporting detail or your main topic.

what are the events?

d is the correct answer.

b is incorrect because it makes food by itself

c is incorrect because us humans don't know how to produce their own food using the sun like plants.

a is incorrect because consumers can depend on carnivores for eating food for consumers to eat the dead organism. same thing with omnivores.