Answer:
It is the cycle when the reproductive organs start to fertilize. Another form of this is called the menstural cycle when natural changes in the uterus and ovaries to make reproduction possible soon.
I personally think that it's D. If this is right you're welcome. If it's wrong feel free to delete this answer :p
the moon's shadow falls on earth
Explanation:
the sun is behind the moon
Skin
The skin sheds excess salt through sweat
