Where does water come from?

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Scientists were thinking about why there is clearly more water on the Earth than on any other planets of the solar system. There are different theories and researches conducted on this topic to figure out what exactly happen on earth in early stages to save us as a blue planet. A part of the water on the Earth may have arisen as a result of the release of magma, and so ultimately originated from the Earth’s interior. Though the presence of much of the water can be justified through this explanation, it is questionable. Large quantities could also have come to earth from comets, trans-Neptunian objects or water-rich asteroids from the outer reaches of the asteroid belt.
By measuring the percentage of some elements such as impurities in carbon-rich chondrites scientists found similarities between earth’s water and water rich commits.