Answer:
I believe the answer is #3, chemical bonds.
The skin synthesizes a precursor of CALCITRIOL in response to UV radiation in sunlight.
Calcitriol is also called Vitamin D3; it is the hormonally active metabolite of Vitamin D. It is used as drug to treat bone disorder, hyperthyroidism and calcium deficiency.
The answer in my opinion should be aids
Answer:
For the friend, she will will have heavy rain, drizzlings, and maybe even some frozen rain and sleet for the next few days. For me, it is just regular days with sunny skies and just everything normal.
Explanation:
