The is composed of lakes, rivers, and oceans.

The answer is the surface water (hydrosphere).

The hydorsphere is the amount of water in all of Earth. It comes in different forms, liquid, solid and gas.

Clouds and vapor form the gas form of water. Rivers, oceans and lakes form are surface waters that form the liquid part of the hydrosphere, but this also include underground water like wells, aquifers, and underground rivers. The solid part of the hydrosphere include the ice caps. glaciers and the like. 

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!