High levels of biodiversity in the rainforest have resulted in
a.
low levels of competition for resources
b.
generalist organisms able to thrive in many environments
c.
optimal conditions for life to exist
d.
organisms specialized for living in a particular niche

D. Organisms specialized for living in a particular niche.

some fungi obtain their nutrients from a living host (plant or animal) and are called most biotrophic fungi have fairly narrow host ranges—they are specialized on a limited called rhizomorphs that allow the fungus to grow from one tree to another. ascospores are formed inside a sac-like structure called an ascus. so your answer is a