This water comes from bodies of water, principally seas and oceans.
This source is ocean waters.
The energy from Sun is the most important.
Water is evaporated from oceans, seas, lakes, rivers.
What needs a heat source to begin evaporating. Normally the sun is the heat source that evaporates water on the earths surface.
This source is water from oceans.
Water evaporates mostly from water bodies.
the mantle
The main source is formed by sea and oceans.
radiation & gravity
Water is evaporated from oceans, seas, lakes, rivers.
Water is evaporated from oceans, seas, lakes, rivers.
To the best of my knowledge, the water under the surface was formed when the oceans were formed, or thereafter. In simple terms, cracks in the ground allows water to leak below ground into large open voids.