Explanation:
A hypothesis mustn't be too detailed since you are about to take the experiment and not sure of the outcome so we have to stick with Light intensity has an impact on the rate of photosynthesis.
Hope it helps. 
 
        
             
        
        
        
Answer:
A.Radiation is the answer
 
        
             
        
        
        
C. Hardness is the answer
        
             
        
        
        
Answer:
Option D
Explanation:
Postpartum depression is majorly experienced in woman who has recently entered into motherhood. This form of depression arises because of the complications involved in a child birth. It is strongly driven by sudden changes that come up in the life of a woman after becoming mother such as – loss of job, responsibility of child, tight life schedule etc. some common symptoms of this problem include – mood swing, anxiety, sleeplessness, crying etc.  
Hence, option D is correct
 
        
                    
             
        
        
        
The following answer to the equation is landslides