I think 1) B I don't know what 2 is but it isn't A or B it is between C or D
The first one would be temperature and salinity
the second one is convection.
You are correct the answer is c
We see the moon because the sun's light reflects off it. So the phases change depending on how much the sun reflects of it. The moon circles around the Earth so at certain times there will be a full moon and at certain times a new moon and everything in between.