The answer is -- D. A & C
Don't smoke
wear sunblock
eat healthy
I would imagine a reasonable goal to start with would be skate up and down your driveway.
They belong to buccal cavity which is a part of the digestive system.
Answer:
Reduce, reuse, and recycle. Cut down on what you throw away.
Volunteer. Volunteer for cleanups in your community.
Educate.
Conserve water.
Choose sustainable.
Shop wisely.
Use long-lasting light bulbs.
Plant a tree.