I just took a test in school today. What question was I asked?

Question I was asked: Which type of energy in gasoline is transformed into mechanical energy in a motorcycle engine?

I just took a test in school today. What question was I asked?

Question I was asked: Which organisms benefit in the relationship between bees and flowering plants?

I just took a test in school today. What question was I asked?

Question I was asked:
Why do mountain climbers at high elevations use oxygen tanks to help them breathe?