Why is “ plankton” mentioned in line 16? 

Câu hỏi: Why is “ plankton” mentioned in line 16? 

A  To demonstrate the interdependence of different species

B  To emphasize the importance of food resources in preventing mass extinction.

C To illustrate a comparison between organisms that live on the land and those that live in the ocean

D To point out that certain species could never become extinct.