15. Where are you likely to find the LOWEST population density if North America? a. the Boston to Washington, D. C. Megalopolis
b. the Western USA between Las Vegas and Los Angeles
c. Northern Alaska and Canada
d. Hawaii

Magma is outside the volcano  and lava is inside the volcano. 

Iwould say d. eye contact and body language because you aren’t using any spoken communication. hope this : )

The name may be in importnce  to them

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.