Necesito 4 párrafos bien explicados sobre la pregunta de abajo pero no se como empezar alguien me podria ayudar porfavor? ¿Qué debería hacer Estados Unidos en el siglo XXI sobre la inmigración?

Is the idea of containment relevant to american foreign and policy today why or why not

How was rockefeller able to build his monopoly across the oil industry? he found newer and cheaper ways to refine oil, increasing his profits. he confined his business to ohio so he could buy all the refineries there. he bought up oil refineries, cut costs, and reinvested his profits in other refineries. he began to sell kerosene as well as oil, expanding his market.

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.