Ais a barrier built across a river that may redirect its flow to another channel or store floodwater so they can be released easily.

What is a small water source like a stream or brook?

Which type of seismic waves are confined at the surface

Tides are caused by a differences in the gravitational force of the sun at different points on earth. differences in the gravitational force of the moon at different points on earth differences in earth’s gravitational field strength at different points on earth’s surfac fluctuations in the gravitational attraction between earth and the moon.