Answer:
I will research on troposphere Because:-
 1. Most of phenomena occurs in troposphere 
2. Most of terrain is found in troposphere
 3. It is first layer of atmosphere
 4. It is the nearest layer of atmosphere from the surface of earth
 5. As it contain most of things so there most chance of discovering a new undiscovered thing
Explanation:
Hope this help!!
 
        
             
        
        
        
Answer:
Hello There!!
Explanation:
The answer is 100 metres.
hope this helps,have a great day!!
~Pinky~
 
        
                    
             
        
        
        
Moderate is your answer hope this helps!
        
                    
             
        
        
        
Forests capture and store water and can play an important role in providing drinking water for millions of people in cities,villages and towns.Forest contribute to the reduction of water-related problems like floods by absorbing water through their roots and storing it in the ground.
        
             
        
        
        
a region that is made up of different places that are linked and function as a unit