Question

choose the best transitions to complete the passage.
football is an important part of the high school experience in many towns around the nation. studies show, however, that helmets do not provide enough protection for the brain. in fact, some players can end up age. a blow to the head causes a concussion, which means that the brain hits the skull. however, schools should consider whether the game is worth the risk.

Explanation:

• "However" is used to show a contrast. The first sentence says football is important, and then it contrasts with the fact that helmets don't protect enough.
• "Therefore" is used to show a conclusion. Since there are risks (helmets not protecting enough, concussions), the conclusion is that schools should consider the risk.

Answer:

However, Therefore