When is it not necessary for a person to wear sunscreen during a recreational activity?
a. when it's cold outside
b. when it's not a sunny day
c. when the activity is shaded by trees
d. when the activity is indoors

The answer is D) when the activity is indoors. Whilst most people use common sense and discretion about when to apply sunscreen, there is no way to be certain as to how strong the harmful UV rays that come with sunlight can be on any one day, or in particular conditions.

Cis the

Air goes past the epiglottis and into the trachea when you breathe in. from there, it goes to your vocal cords in the larynx until it reaches the bronchi. from the bronchi, air passes into each lung.