Because the earth is in an angle so the northern hemisphere receives more heat and vice versa
        
             
        
        
        
Answer:
D
Explanation:
Blood is pumped by cardiovascular, respiratory system breathing process takes in oxygen and breaths out carbon dioxide when the digestive system food process gives the body energy for this processes to be successful 
 
        
             
        
        
        
Answer:
Yes that is true
Explanation:
The golgi is what makes the individual proteins for the cell
 
        
             
        
        
        
Genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring). 
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