In this example, matter and energy changed forms and locations as they flowed through the ecosystem. What else is true?

An ecosystem is a group of living organisms interacting with one another and with their environment. That environment can include soil, air, water, and weather systems. Ecosystems can be simple and sparsely populated or complex and full of life. Some of the most densely packed and varied ecosystems in the world are places like rainforests and underwater coral reefs.

Explanation:

the answer would be b).