They turn sunlight into electricity
        
             
        
        
        
I would say B.
A, umm, don't crash trains, that's bad.
C, Lillian is wondering how fast a train can go, not at what curve will it fall.
D, Lillian isn't wondering about the size of the trains, just the speed.
        
                    
             
        
        
        
Answer:
Sensory cells last approximately two weeks and are renewed frequently.
Explanation:
 
        
                    
             
        
        
        
Answer:
B
Explanation:
The child may go through growth spurts at 7-14 days old, between 3-6 weeks old, around 4 months old, and around 6 months old. So feeding them at that consistency will help in their development.