A(n) results from the chemical union of two or more atoms

surface mining destroys mountain tops, landscapes, forests and wildlife habitats. on top of that, it leads to soil erosion and destruction of agricultural land. the landscape changes can also disrupt river channels and streams, which leads to flooding. which, can destroy plant life and other animals as well.

explanation:

x would be the most and the least would be y because there are more fruit   and seeds than flock z has insects