Question

Biodiversity is the number of species...
a. of animals living within an ecosystem.
b. of plants and fungi living within an ecosystem.
c. of bacteria and protists living within an ecosystem.
d. living within an ecosytem.

Answer 1

Biodiversity refers to a varitety if life in the world, or habitate, ecosystem. 
So the answer that is best to choose would be: D Living with in an eco system.