I'd say the correct answer is D - mythological. Because Neptune is the god of freshwater and the sea in Roman mythology, and he has a counterpart in Greek mythology - Poseidon.
Answer:
A. To inform, to entertain, and to persuade
Answer:
"effortless"
Explanation:
"less" is the suffix which negates "effort".
You're exerting strength and attempt when giving effort at a task and either don't have to (as in this case with playing the instrument) or don't when doing something effortlessly, thus the two have opposite connotations via the suffix.