What was the major motivator of the arms race during the cold war

The diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

Plzz on what physical process is responsible for the creation of volcanoes, earthquakes and ocean trenches at the plate margins?

The action of eventually a low island to form. a. wind b. waves c. volcanoes d. tectonic plates