If this is the whole question, I believe answer A would be correct. Considering the question asks about the environment, recycling contributes to our environment.
Volunteering at a recycling facility is the correct choice. Since the question was talking about the environment. I'm taking the test rn btw. <em>Mark </em><em>brainliest</em><em> if</em><em> </em><em>my </em><em>answer</em><em> helped</em><em>,</em><em> </em><em>thanks!</em>