The ocean are essential to life on earth. Without oceans, many of earths plants and animals would not exist, and transportation routes for humans would no longer exist. Also, all of the food that people and animals get from the ocean would be gone, eventually causing all things to starve and die. The ocean is extremely important to every living things survival.
The ocean is plentiful and good for human life, but it's water can also hurt us. The ocean is full of salt water. If a human drinks salt water, they will be taking in so much salt along with water. The body will pee in order to get rid of the salt. You will eventually get rid of more water than you consume. Drinking salt water will dehydrate you faster than you already would.
Ocean currents also affect our climate. Warm water and precipitation are brought up from the equator to the poles. After, cold air from the poles comes back down to the equator. Ocean currents act sort of like a conveyor belt.
The Ocean provides us with many resources. This video will highlight some of the resources that humans use from the Ocean
There are many different layers of the enormous ocean. The chart below lists some of the main layers of the ocean.