What cause competition?

Competition is an interaction between organisms or species in which both the organisms or species are harmed. Limited supply of at least one resource  used by both can be a factor.

Explanation:

competition is caused by more than one organism going for the same resource due to short supply of resources such as food water and space to live

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:

b.