The world has really big areas of water called oceans. There are five oceans in total: the Atlantic, Pacific, Indian, Southern, and Arctic Oceans. These oceans are really, really huge and they are separated from each other by lines called ocean borders or ocean boundaries.
Think of the ocean borders like lines that separate your room from your brother's room. The borders of oceans separate the Atlantic Ocean from the Pacific Ocean, the Pacific Ocean from the Indian Ocean, the Indian Ocean from the Southern Ocean, and the Southern Ocean from the Arctic Ocean.
You might be asking yourself, 'if the oceans are so huge, why do we have borders?' Well, borders help us to understand how the water in one part of the ocean is different from another. For example, the water in the Pacific Ocean is saltier and has bigger waves than the water in the Atlantic Ocean. Understanding these differences helps us to study and protect the oceans more effectively.
In conclusion, the borders of the oceans are lines that separate one ocean from another, kind of like how your brother's room is separated from your room. These borders help us to understand the differences between the oceans so we can better care for them.