The correct answer is B. Participating in a park cleanup
Step-by-step explanation:
Acting responsibly in a community implies you understood your role and responsibilities as a member of a community, for example, a school, neighborhood or city. Due to this, you contribute with your actions to solve the problems in your community or help others.
According to this, the option that is an example of a teen acting responsibly in the community is "Participating in a park cleanup" because this action benefits all members of the community, also, it addresses possible problems in the community such as pollution in parks or public areas. Besides this, others such as "exercising and eating nutritious meals" or "earning extra money at an after-school job" benefit the teen but not those surrounding him.