It's muscle hypertrophy which means muscle swelling. Muscles appear to be bigger, but it doesn't mean the fibers are stronger than a power lifter, or a shot putter or a tennis players muscles. Body building pumps blood into the muscles, which increases the muscle fibers along with many other reasons. The muscles appear to be bigger. Any form of exercise will increase strength, but there are small men that are much stronger than some of the larger body builders.
Body builders are more high endurance strength.
I learned more from being involved in sports than anything in my life. You learn about your body, you learn about participation as a team. You learn about sharing, you learn about discipline, giving your all, you learn about not succeeding and coming back to try harder next time. You learn the most important thing is just trying your hardest. It sounds clich , but you learn it's the journey to get to the competition that's most important, and not even the competition.