Which of the following is not a common characteristic of agricultural villiges throughout the world

What does the word submerged mean in the following sentence? after it rained for three days in a row, the streets were completely submerged.

The last photo u wonder what is this telling me to do?

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