What is the difference between Texas Coastal Plains and Texas North Central Plains? And what are the similarities? (Btw I’m only in 7th grade so don’t make it to smart) I will also give brainliest!

The current is like a stream or river in the ocean true or false

Most tornadoes carry winds speeds in a range of km per hour

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?