Question

What about Earth allows it to maintain bodies of water?

Answer 1

Hint: The discovery of a massive body of water on Planet Earth's surface is actually the unique one in the solar system that has been confirmed. Most planets, such as Mars, may have had running water on their surface in the past or may have liquid seas of water under a frozen ice layer now (Jupiter's satellite Europa).

Complete answer:
Water at the surface of the Earth is constantly in motion, as it shares places with gaseous moisture and water droplets present in the atmosphere. Fresh water in lakes and seas on the planet's atmosphere evaporates as the sun warms it.

Our planet's liquid water is a result of the following factors:
Gravity: The gravity of the earth is sufficient to produce a gravitational field capable of preventing water vapor and other gases from escaping into space.

Atmosphere: The Earth’s atmosphere is essential for the creation of clouds and rain, as well as the life of the water cycle and, as a result, the presence of seas, lakes, and rivers.

Temperature: The planet's surface temperature (16°C) is just beyond the spectrum of liquid water. In other words, water on Earth will not be completely frozen, like it is on planets that are too cold, or completely evaporated, as it is on planets that are too humid. This is because there is an atmosphere (which acts like a warm blanket) and the sun is at the proper distance (not too close or too far).

Note: Land water and groundwater are the two major bodies of water. Lakes, ponds, and reservoirs all have surface water. Groundwater is located under the earth's crust, where it travels into and fills holes in the rocks. Aquifers are the rocks that contain and distribute freshwater.