Question

water can exist in 3 states: solid, liquid, and ______? lava clouds gas puddles

Explanation:

The three fundamental states of matter that water can exist in are solid (ice), liquid (liquid water), and gas (water vapor). The other options are not states of matter: lava is molten rock, clouds are collections of water droplets/ice crystals, and puddles are liquid water in a specific form, not a distinct state.

Answer:

Gas