What does the term "demand relationship mean? How does price afect demand?

Why did leaders such as siddhartha gautama abandon hinduism to createbuddhism around 500 bce:

7. how did the early egyptians use the flooding of the nile river to their advantage? they diverted the water to flood their enemy's lands and destroy their crops. they created an easier way to travel to the mediterranean sea and the indian ocean. they established a new water-based athletic event for the ancient olympics in greece. they devised an innovative irrigation system, which created a surplus of food.

Which of the following wrote detailed accounts about early native american? a) spanish b) french c) americans d) mexicansi need this !