Which of the following sentences is punctuated correctly? Bobby, who hates being undersized, saves Greg from a meat locker in an episode
of the Brady Bunch.

Bobby who hates being undersized saves Greg from a meat locker in an episode
of the Brady Bunch.

The first one is correct. The second one is a run-on sentence, like speaking without pausing at a comma to take a breath.

you didn't list the options but im guessing it's resolving contradictions

your answer is c) experiments with water vapor showed that elements combine in specific proportions.