Question

how does loss of biodiversity affect the biosphere?
a. natural food sources are lost.
b. new sources of medicines are gained.
c. extinct species are replaced by new species.
d. ecosystems become more resilient to change.

Explanation:

Biodiversity loss means fewer species. Many species are food sources, so loss of biodiversity leads to loss of natural food sources. New medicine - sources are not gained as species are lost. Extinct species are not easily replaced, and ecosystems become less resilient to change.

Answer:

A. Natural food sources are lost.