U. S. cities like New York, Los Angeles, San Francisco, and Chicago were formed because of . a.
a natural harbor area
c.
an abundance of animals to hunt
b.
prime agricultural land
d.
pleasant year-round temperatures

Answer(say);

The answer is c, i, iii, and iv. this is because farming and mining deal with harvesting raw materials, construction work falls under manufacturing, and piloting a plane is a service. ii is wrong because making bread is using  raw materials to produce goods, which would fall under the secondary sector, not primary.