Question

How are tides, waves and ocean currents useful for us?

Answer 1

uses of tides

Tides help in clearing the position at the mouth of river thus preventing silting of harbours

Tides are also useful for generation of electricity but there are very few commercial sized tidal power plants operating in the world

uses of ocean currents

winds blowing over warm currents and extremely moist and cause rainfall

ocean currents also facilitate navigation ships flowing over the current are able to move faster and save time and fuel