The Brainliest Answer!
(1) They produce more than half of the oxygen in the atmosphere, and absorb the most carbon from it.
About half of the world’s population lives within the coastal zone, and ocean-based businesses contribute more than $500 billion to the world’s economy.
The air that you breathe, the water you drink, the food you eat, the products that keep you warm, safe, informed, and entertained — all can come from or be transported by the ocean.
Ocean waters serve as a source of food and valuable minerals, as a vast highway for commerce, and provide a place for both recreation and waste disposal.
It has been estimated that as much as 10% of human protein intake comes from the oceans
Ocean water is processed to extract commercially valuable minerals such as salt, bromine, and magnesium. 
The oceans also are important for recreational use, as each year more people are attracted to the sports of swimming, fishing, scuba diving, boating, and waterskiing.
Ocean ingredients, like algae and kelp, are used in making peanut butter beer, soymilk and frozen foods. Plus, 36 percent of the world’s total fisheries catch each year is ground up into fishmeal and oil to feed farmed fish, chickens and pigs.
ocean ingredients flowing out of your medicine cabinet in everything from shampoos and cosmetics to medicines that help fight cancer, arthritis, Alzheimer’s, heart disease, viruses and other diseases.
 Oceans also regulate our weather and form the clouds that bring us fresh water.
2 5 2