Ritual bloodletting was crucial to maya rituals because

it was associated with rain and agriculture

explanation:

At that time, the Mayan civilization held a belief that offerings through bloodletting ritual will make the Gods look at them in their favor and reward them with good weather for their agriculture (enough rain, warm temperature). In their perception, They did it to ensure that their people could survive food shortage.

early settlements on the subcontinent. both the indus and the ganges rivers carried rich silt from the mountains to the plains. when the rivers flooded, the silt spread over the plains and made the soil in the river valleys fertile for farming.

answer; i believe that the correct answer is ( troxel v. granville);