According to scientists, what are the two main sources of water on the Earth? Choose TWO answers

Rain

Explanation: Rain is the most prevalent way for the Earth to receive water. Rain is, in fact, an active component of the world's water cycle.

When the water on the earth and in the oceans evaporates owing to the heat of the Sun, clouds form, and clouds produce rain.

Rainwater is directly or indirectly used by all water bodies on the planet, including oceans, seas, lakes, rivers, aquifers, groundwater, tubewells, and streams.

Rain is the world's most abundant source of water.