B or D, although I'm not sure which
Answer:
mental wellness
Explanation:
this is good for your mental wellbeing so your brain doesnt get overwhelmed by the amount of work you are doing so being persistent with breaks are good.
Answer:
It has a low density and opaque.
Explanation:
As it is opaque, the reading of the thermometer can be read accurately
They could go for a hike or a walk. Hikes in a nearby forest are a great way to see nature on a daily basis and free of cost. If in an non rural area, such as a city, walking around town is a great way to get more physical activity! Another great way is to visit a zoo; most zoo have walking distance between the different animals. You can get both the active and nature in that as well.
(And I can't think of another one sorry)