The answer is Ultraviolet Light
The easiest way for us to obtain a sustainable amount of Vitamin D is by exposing our self to morning sunlight ( which contain ultraviolet light)
Often time, we don't consume enough vitamin D and our body need to get it from our bones, and in order to do that, it need to be activated through enough exposure from sunlght
The correct answer for this is sperm. Hope this helps.
Answer:
D.choosing clothing that is appropriate for the environment and type of exercise
Explanation:
the other ones are a safety concern
this is the only one that is 100% safe
Answer:
D
Explanation:
I would think this, because the health inspector may want to know what the place is being cleaned with.
It would be B or C. I'm SURE it would be C though.
"A" means to cause air to enter and circulate freely in (a room, building, etc.), which fire NEEDS air in order to be alive, so that would be BAD. "D" is saying to store guns in locked cabinets... which doesn't really make sense.