Plz help me 30 points

Superfast

Explanation:

Key word is speed here because energetic and vigorous are basically the same meaning and nowhere in the sentence it says anything about the energy of the horse. Superfast and breakneck also basically mean the same thing however I think this sentence wants you to use the term superfast because breakneck means like a dangerously fast speed and it also doesn't say anywhere in the sentence that the horse is dangerous.

the economic difference between the three colonial regions. shipbuilding, whaling, fishing, and trapping where also main factors to the economy. the southern regional colonies economy was based on sugarcane, rice, cotton, tobacco, and indigo.