Answer:#1:
I think the quote means, "Struggle helps people overcome bad situations for a better future".
#2:
Yes, I agree with C.S Lewis, why? Becuase without harships, you can't help yourself grow to be better. Being better can help your future. Why? Because without growing, we will never change. Without change, people stay the same and nothing can be accomplished.
#3:
Use people you know for this, maybe your mom or dad, and how their jobs pay the bills so you can live where you live. Have food, clothes, and a roof over your head. Maybe a grandparent who made it possible for your parents to grow up and be who they are now for you. Maybe an uncle who did something nice for you, or maybe someone who was there for you along the way for your own struggles.