4. Encircle the odd one out and give reason​

A

Explanation: none of the listed can be produced naturally from the human body

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. the carbon cycle ensures living things have a source of hydrogen