1. a flood
2.to control the speed of water flowing in the river and it also protect from flooding.
4. all of the above
5. INDIA
6. trees and plants
SORRY THAT I M UNABLE TO GIVE AMSWWR TO THE 3RD Question
 
        
             
        
        
        
The best answer here is A
Hope this helps
        
                    
             
        
        
        
I believe the answer is Sebaceous gland. Sebaceous glands are microscopic exocrine glands (glands that secrete and produce substances using ducts to an epithelial surface). They are found in the skin and secrete oily or waxy substance called sebum. Sebum functions to lubricate and waterproof the skin and hair of mammals.