a, because exercise doesn't just aid the prevention of certain diseases, it helps prevent many diseases. i would've chosen d if it wasn't so specific but a is the correct answer.
Depressants. aka things such as alcohol, heroine, & many other drugs<span>.</span>
A smile! It's great to see different smiles from everywhere in the world and it's joyous all around to see positivity, and everyone having the same basis of expression no matter where they're from. :) Hope this helps!
The answer would be A i assume, hope this helped !
