How do geologists study direct evidence of Earth’s interior?

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

Which state has the highest killing rate?

Which evidence is most likely used to indicate the beginning of solar system formation? a. materials combined to form a mass. b. materials were pulled together by gravity. c. water condensed and collected to form oceans. d. different species of microorganisms lived on earth.