Question

How many oceans are there in the world?
A] 2
B] 3
C] 4
D] 5

Answer 1

Hint: The ocean is an enormous and continuous saltwater body that covers more than 70% of the surface of the Earth. The currents of the oceans control the atmosphere of the earth and swirl a kaleidoscope of life. The oceans contain approximately 321\ million cubic miles ( 1.34\ billion cubic kilometers) of water, comprising approximately 97% of the Earth's water supply. The weight of seawater is around 3.5 percent dissolved salt; chlorine, magnesium, and calcium are also rich in the oceans. The oceans absorb the heat of the sun, pass it to the atmosphere, and spread it worldwide.

Complete answer:
Five large basins can be classified into the entire topography of ocean plates: the Pacific, Atlantic, Indian, Arctic, and Southern basins. Smaller ocean areas are called oceans, gulfs, and bays, such as the Mediterranean Sea, the Gulf of Mexico, and the Bay of Bengal. Inland saltwater sources, such as the Caspian Sea and the Great Salt Lake, are different from the oceans of the planet.
The southern portions of the Pacific, Atlantic, and Indian oceans and their tributary seas surrounding Antarctica are sometimes referred to in the Southern Hemisphere as the Southern Ocean. To discern the limits of seas and gulfs that have historical, political, and often ecological significance, several subdivisions can be made. However, these boundaries do not constrain water properties, ocean currents, and biological populations. Indeed, they are not known by many researchers either.
So, the correct answer is Option D.

Note: Despite their importance, as a result of human activities, the oceans are facing unprecedented threats. An estimated 8\ million tonnes of plastic waste end up in the waters of the world every year. At the same time, climate change is harmful to coral reefs and other primary ecosystems; overfishing is jeopardizing the survival of fish stocks; nitrogen contamination is leading to the formation of dead zones, and almost 80% of the world's wastewater is disposed of without care.