What are the four characteristics of minerals

What season is it in the southern hemisphere when it’s december? a) fall b) spring c) winter d) summer

Explain the value of statistics and other data to positive economics and to normative economics

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?