Answer and Explanation:
The survival of humankind depends heavily on the natural world. For instance, we get the supply of oxygen from trees and trees absorb the waste we release in the form of carbondioxide. Also, the fruits and vegetables we get from the natural world is good for the health of humankind, rivers, oceans and soils provide us with the food we eat, the air we breathe, the water we irrigate our crops with. The sun also provides sunlight which contributes to the photosynthesis of the food we eat, also provides humankind with vitamin D.