No.
The speed of sound in water depends on the temperature and pressure. As you go deeper, the pressure increases and the speed of sound increases.
A) WHERE ARE THE PEOPLE
B)WHERE IS THE POPULATION GROWING
C)WHY IS THE POPULATION GROWING
I believe the correct answer from the choices listed above is option D. The difference between a seismograph and seismogram is that a seismograph is the instrument that detects and records volcanic activity, while a seismogram is the written record of that activity. Hope this answers the question.
That would be the Himilayas. Hope that helped!