How was the Hippodrome different from the Colosseum?

The hippodrome (Greek: ἱππόδρομος) was an ancient Greek stadium for horse racing and chariot racing. The Colosseum in Rome, Italy, is a large amphitheater that hosted events like gladiatorial games.

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i hate my life too. (like jayfeather hates his blindness x3)

answer; i believe that the correct answer is (c) arctic tundra;