The northern european plain stretches from the atlantic ocean to
a. appalachian mountains
c. eurasian peninsula
b. ural mountains
d. pacific ocean

In the diagram below dab and dac are adjacent angles

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?

In 2002, north korea announced that it was shutting down its nuclear facilities constructing a hydroelectric energy plant restarting nuclear weapon development changing to a free market economy