Como evolucionaron las ciudades industriales?

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

"water seeps into rock cracks and dissolved minerals there. the solution travels through cracks in the. eventually concentrating into large crystals." which process is that

Aplane cuts a pyramid as shown in the diagram. what is the shape of the cross section? a. a hexagon b. a pentagon c. a square d. a triangle