Simile is a type of figurative language that uses like or as
to learn you sometimes need to compete with others, but you can also do things your way and have it be fun at the same time, that is why science tends to be more fun to most
Overall, Thoreau wanted to prove that not everyone will easily flow with the rules of society. As a result, he calls the people who go different paths than the ones of society "different drummers."
In conclusion, your final answer should be A.