One way in which organisms maintain homeostasis is by detecting foreign cells and particles like pathogens and cancer cells. once the pathogen is detected and identified, other systems in the organism's body can attack the invader, thus keeping the organism healthier. cells of the human immune system are finely tuned to recognize and respond quickly to disease-causing organisms.

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:

mountains can affect the climate of nearby lands. in some areas, mountains block rain, so that one side of a mountain range may be rainy and the other side may be a desert. much of airborne moisture falls as rain on the windward side of mountains.

explanation:

oceans

indian ocean

pacific ocean

atlantic ocean

arctic ocean

southern ocean

the correct answer is 2 and 4