How does temperature and salary affect deep water currents?

Did you mean salinity? if so i think differences in the density of water can also cause currents to form and move. Density is affected by temperature and salinity. Cold water or water with dissolved salts (higher salinity) is denser than warm water or water without dissolved salts (low or no salinity).

B.  earth orbits at a slower rate than the rate at which the moon orbits earth.

The angle measures would be 70 and 90