Answer:
Turbulent means: violent
Serene means: calm
Ballast is: something that helps balance a ship
Explanation:
Ship captains do what they can to avoid turbulent weather. Rough, stormy seas can threaten ships, which is why captains avoid them and favor serene conditions.
Stormy seas cannot always be avoided, however. In that case, a ship’s ballast—heavy material that is located in the bottom of a ship and acts as a stabilizer—is essential.
