a solid, a liquid, and a gas (vapor) a solid and a liquid a solid and a gas (vapor) a solid only
A hydrologist studies the location, movement, and quality of water. A hydrologist recognizes the importance that water exists as ___.

Options:
- a solid, a liquid, and a gas (vapor)
- a solid and a liquid
- a solid and a gas (vapor)
- a solid only

a solid, a liquid, and a gas (vapor)