The two ways the endocrine system and the nervous system are different in communication, is that the nervous system responds rapidly to short-term changes in the body by sending electrical impulses. And with the endocrine system, it takes longer, so it's a long-term effect until it notices any changes and when it does, it sends chemical messengers known as hormones into the body. 
Now, how they are similar, is because both the nervous and endocrine systems work together to maintain homeostasis.
 
        
             
        
        
        
B - The environment within the cell is stable.
Homeostasis is when your body works to maintain equilibrium (balance) so within a cell, the cell would be stable
 
        
                    
             
        
        
        
The trends that shows the increasing use of renewable energy are:
- Houses and cars powered by solar energy 
- Use of geothermal energy in areas with hot water springs
- Construction of wind energy farms in sea
- Research for cheaper and efficient material for solar cells and batteries
- Construction of dams to harvest kinetic energy of flowing water
- Research for alternative biofuels from the leftover husk of crops.
 
        
             
        
        
        
I think it is A to, since the tissues are the closet thing to cell, which microscopic anatomy studies.