Answer:
B. Simile
Step-by-step explanation:
Simile is a thought of comparing one thing with another thing. In this author directly compare two things and finds a similarity between them. This makes a expression more explicit and easy to understand. The comparison makes it easy to decide. In the given sentence the author has compare with an arrow. He tries to convince that if you want to move towards a path go like an arrows. Just as an arrow is unstoppable and reaches its destination quickly without considering the path and environment.