How did the Northwest Ordinance of 1787 affect slavery? It stopped slavery from spreading to that area.
It prohibited teaching enslaved people how to read.
It abolished slavery throughout the nation.
It allowed enslaved people to settle in the West.

The answer is A: "It stopped slavery from spreading to that area."

Explanation:

Considered one of the most important legislative acts of the Confederation Congress, the Northwest Ordinance also protected civil liberties and outlawed slavery in the new territories.

i believe your answer is d)

food chain i would say only because there is competition on getting food and survival