Atown experiences a smaller earthquake several days after a large one. what has occurred?

The earth is still at a place where the tectonic plates were not settled and were still slightly moving

The other answer is wrong
When a large earthquakes is followed by smaller ones, the small ones are called AFTERSHOCKS
Hope this helps!

Mexico has a host of environmental problems, including significant chemicalpollution  from factory discharges and waste dumping, but the main threat to itsbiodiversity  probably stems from  deforestation  and other natural habitat losses. forest habitat is lost for a number of reasons

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.