Which development made it possible for the Comanche to move from the Rocky
Mountains onto the Plains?
1. design of the teepee
2. use of a horse for transportation
3. opening of trade routes
4. settlement of Europeans

Answersouth

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.