What is the type of the city that is planned and considered a sleeping room

Witch of the following volcano hazards is made up of rocky particles about the size of a grain of sand

During which era in earth's history were the first insects? mesozoic precambrian cenozoic paleozoic

This is a 2017 topographic map of puerto rico in the united states, and i'm sorry that people there have suffered such a disaster. i want to ask, what do the yellow dots and areas represent on this graph? and the blue area and the little blue circle, and the little blue sign that looks like a signal tower, what do they stand for?