Cellular respiration
Explanation:
The energy animals need for their life functions are released when their cells carry out cellular respiration. 
Cellular respiration is a metabolic process by which living organisms breaks down organic molecules using oxygen  especially glucose to produce energy and gives off carbon dioxide and water in the process. 
It is the reverse of photosynthesis. 
During this process, chemical energy stored in food substances are released and converted to heat energy. 
The process takes place in the mitochondria of a cell. 
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Respiration brainly.com/question/5895241
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The answer should be 4) as it is known that uv radiation might have an effect on dna, thus causing mutations such as skin cancer in humans.
        
             
        
        
        
Answer:
ya of course 
Explanation:
system is working together 
but network issues also came just kidding 
good going 
 
        
             
        
        
        
Sweat is used for thermoregulation. As sweat is released onto the surface of the epidermis, heat from the body is conducted into the water. Water is a better conductor of heat than air is. As the sweat evaporates, the heat from the body dissipates into the environment.