Clear-cutting forests and draining marshes contribute to a reduction in many plants and animal populations because these practices? poison the soil.

destroy habitats.

pollute water supplies.

introduce enemy species.

the answer is destroy habitats.

Explanation:

Clearcutting can destroy an area's ecological integrity in a number of ways, including: the destruction of buffer zones which reduce the severity of flooding by absorbing and holding water; the immediate removal of forest canopy, which destroys the habitat for many rainforest-dependent insects and bacteria; the removal

i'll just take the points xd

money is the anwser i think