Answer:
Try answer B that should be correct
Explanation:
 
        
             
        
        
        
Answer:
Natural selection, mutation, and genetic drift are random events.
Explanation:
A mechanism of evolution in which the frequencies of alleles of a population change with generations because of sampling error is known as genetic drift. It takes place in all the populations of non-infinite size, however, its influences are strongest in small populations.  
Hope this helps :)
 
        
                    
             
        
        
        
 Biology answers many questions<span>, </span>but its main focus is<span> how living organisms interact and function.
hope it helped give thanks :)
</span>
        
                    
             
        
        
        
The type of stimulus following a behavior removes something that is unpleasant is the negative reinforcer.
Stimulus is any signal. This can be in the form of touch, smell, taste, etc. This stimulus triggers the nerve cells of the body that send to signals to the brain to generate a response. For example, when one person touches a hot utensil, the touch of heat acts as a stimulus, where the brain sends response in the form of instantly removal of the hand. 
Negative reinforcement is the response towards a stimuli that has not yet been received. For example, taking a medicine before any disease appears  is the acts of negative reinforcement.
To know more about negative reinforcement, here
brainly.com/question/14299460
#SPJ4