Sunlit zone is depth of water exposed to sunlight, trenches is a long narrow ditch.
The Answer is 3. Cattle ranching
It is in Asia .
Near Indian ocean.
The changing ocean currents lead to climate cooling by bringing cooler breezes to places with higher climates. The cool breezes push the warm air out and leads to the drop of temperature
The answer is Mahatma Gandhi. He used non-violent methods to revolt against the British.
Hope this helps :)