hormons. hormones are released from glands and they all belong to the endocrine system. 
 
        
                    
             
        
        
        
Answer: Mouth.
Explanation:  
The mouth is known to be performing both the tasks of chemical digestion and mechanical digestion.
The food is ingested through mouth and the teeth perform the process of mechanical digestion by breaking down the food particles into smaller particles.
Then the saliva gets mixed into the food and the enzymes(amylase) present in the saliva helps in the digestion of carbohydrates.
So, mouth is the organ that performs the process of both mechanical and chemical digestion.
 
        
                    
             
        
        
        
Answer:
The given statement is true. 
Explanation:
The enactment of the Environmental Policy Act or the EPA in 1969 was done to monitor the issues of the environment that took place in the 1960s. It was the major and the primary law, which was postulated at that time to solve environmental issues in the United States. The enactment of the EPA law was done for various reasons, some of which are as follows:  
1. To better the health of human beings.  
2. To generate harmony between nature and humans.  
3. To encourage efforts to reduce destruction to the environment.  
 
        
             
        
        
        
Answer:
marine west coast, humid continental, humid subtropical
Explanation:
this should be right.
 
        
                    
             
        
        
        
B-valine,histidine,threonine,phenylalanine