Describe the effect on the heights of earth’s high and low tides when the moon moves from position d to position a.

Well, something that will hhelp you see the effect on the heights of earths hicch and low tides is the fact that  the Moon's gravitational forces are strong enough to disrupt the balance of the waters by accelerating the water towards the Moon. As the Moon orbits our planet and as the Earth rotates, the waters of the earth also moves. So, in some areas, like in the D position, the waters are in high tides and in the A part will be low tides. 

This is what i found “getting into the technicalities, the continental crust has a density of around 3.0 g/cm3 compared to 2.6 g/cm3 of the continental crust. in addition, the continental crust is much thicker than the oceanic crust. the recycling process does not happen to the continental layer.” i hope this you for what your looking for. can you plz mark me brainliest?