Question

If they share similar animal and plant life, ecosystems can be grouped into __________.

Answer 1

I thin it might be (A) which is biomes.

Step-by-step explanation:

Answer 2

The answer is functional group.

A functional group is a collection of organisms, that share alike characteristics in a particular community. Idealy, this lifeforms would perform equivalent tasks based on domain forces, rather then a common ancestor or some evolutionary relationship.