What is the difference between a sea and an ocean?

Seas are smaller than oceans and are usually located where the land and ocean meet.

Answerweathering;

Historians are researchers of the past or people who understand the history of people. with this field, they must possess qualities such as being unbiased, patient, efficient reader, has a knack for logic and critical thinking and reasoning, disciplined, open-minded, resourceful, with good analytical ability, good reasoning skills and problem solving!