D) Amphibia was considered to be the first to develop lungs
 
        
             
        
        
        
Answer:
Ego-depletion.
Explanation:
Ego-depletion may be defined as the idea used to self control upon the mental resources that can be used by the individual. Individual with low mental ability has low self control. 
The individual that suffers from ego-depletion has impair ability to control themselves for the later time. This might even cause the hindering in the self control as well. Self control is important for an individual even at personal levels. The ego-depletion might create hard time for the restraint. 
Thus, the answer is ego-depletion. 
 
        
             
        
        
        
Answer:
What causes genetic variation?
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).
Explanation:
PLZ mark brainliest also I hope this helps
 
        
                    
             
        
        
        
Answer:
 Viruses cannot reproduce on their own, but inject their DNA into living cells in order to make copies of themselves.
Explanation:
A virus cannot reproduce itself outside the host because it lacks the complicated machinery that a [host] cell possesses.
 
        
                    
             
        
        
        
An asteroid hitting the earth would cause a lot of dust, ash, and other debris to go into the atmosphere which would block the sun which would cause the temperature to decrease.