Weathering,Erosion,Deposition
Th correct answer is letter A. Echo sounding is very useful for depth profiles where SONAR is used to determine the depth of water through the transmission of sound pulses. It is calculated by checking the interval between the mission and the pulse that is recorded within the SONAR device.
Explanation: The standard unit of velocity is metre per second. Velocity can be defined as the displacement of a body per unit time.
