Question

which is the best way to complete the text? you must be present at the raffle drawing in order to claim a prize, but if you leave early, you automatically forfeit your potential winnings.

Explanation:

The first part states a requirement to be present to claim a prize. The second part says leaving early means forfeiting potential winnings. "Consequently" is a proper transition word to show the cause - and - effect relationship.

Answer:

prize; consequently,