1,

If forests are destroyed, animals and other creatures of the forests will come out to human settlements searching for a place to stay. They will be killed more and more by humans.

Environment goes into an imbalance. Humans will start fighting each other for wood and other plant materials. We will end up destroying each other for forest areas.

Slowly, the Carbon dioxide levels rise all over the world. Rains will become scarce, heat level in the world will increase to very high levels and soon a lot of places will become arid and dry. The snow clad peaks of mountains, frozen rivers and the ice at the poles will all melt at a rapid pace.

2, Because:
+Water makes up most of the world: the planet is seventy five percent water.
+Your brain is made almost entirely of water: seventy five percent of your brain is water.
+Trees are almost entirely water: seventy five percent of a tree is water.
+People need to drink at least eight glasses of water each day to stay healthy. The danger of dehydration.
+Water is used to clean things-everything from our dinner plates to our bodies. Your skin and drinking water.

+While a person can live for a few weeks without eating any food, that same person can only live a few days without water.
+Water is used as temperature control both for our bodies as well as our planet.

3, We should conserve water, use walk, bike or take public transit,reduce, reuse, recycle,give composting a try, live energy Wise,eat sustainable foods,give up plastics,..

1. The habitat of creatures living there will be lost

2. Because it accounts for 75% of human body

3. We can plant more green trees and use recycled things