How come a bumble bee's wings are so small in relation to its striped body?

again, asked by a 5 year old.How come a bumble bee's wings are so small in relation to its striped body?
Technically, a bumble bee should not be able to fly.








This is because their wings are underdeveloped for it's body. The reason they can fly is because of the speed they flutter them.How come a bumble bee's wings are so small in relation to its striped body?
Yes, hamloaf