Answer:Digestive and muscular systems would be working together to chew food and work it down to the stomach to be digested. The digestive system and circulatory circulatory system would be working together to break food down and move nutrients to cells. The nervous system decides what to eat and when to chew.
Explanation:
 
        
             
        
        
        
Answer:
B. Archaebacteria
Explanation:
I've never heard of archaebacteria, I've always said archaea, but archaea are known for living in harsh conditions including hot springs, areas with a high concentration of salt, and deep underground.
 
        
             
        
        
        
Answer: pesticides and fertilizer
Explanation: He lives in an area of farm land so, big crops are grown and to keep the bugs off the plants, farmers use pesticides. Then what happens is when it rains, the excess runs off into the river and pollutes it.
 
        
             
        
        
        
Answer: 
The testes are male reproductive glands that produce sperm and release hormone testosterone. Testosterone is the hormone responsible for development of secondary sexual characteristics. It is responsible for the growth of chest hair, deepening of the voice and muscle growth.