Where do supporters of the outside-in model say earth’s water originated from? inside of volcanoes inside the atmosphere bonded to meteorites that hit the earth bonded to minerals in earth's mantle

Bonded to meteorites that hit the Earth

Explanation:

Some hypothesis refering to origin of water on Earth sugges, that a very long time ago as asolar system was young, some asteroids may have landed also carrying frozen water. The meteorites would then turn to provide liquid water, these meteorites were protoplanets from the outer asteroid belt that is in the solar system.

However this still is not the mainstream theory.

it's c. (to reduce the greenhouse effect/carbon gasses)

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.