Which countries are home to the drakensberg mountain range

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

India's population is made up of percent hindus.

If a volcano’s magma is high in silica, the volcano will probably a. erupt quietly. b. remain dormant. c. erupt explosively. d. produce dark-colored lava.