This illustrates <span>absolute threshold. The correct option among all the options that are given in the question is the second option or option "B".
</span><span>A spot in the middle of the retina that only contains cones is called the fovea. The correct option among all the options that are given in the question is the third option or option "C".</span>
        
                    
             
        
        
        
President Lincoln said the "insurgents" wanted to fight because they wanted to extend and perpetuate slavery. At the end of the Civil War, the "insurgents" did not get their wish. The correct answer is B.
        
             
        
        
        
Answer: repel forces and attract forces
 
        
             
        
        
        
Explanation:
<em>Plants adapt to environmental stress by altering their metabolism, flowering, growth, and reproduction; and by migrating toward areas with more favorable climatic conditions.</em>
<em>Sorry if wrong ....</em>
 
        
             
        
        
        
There is 1000 mililiters in a liter