Respuesta :
Air, steam, and water are the different phases of matter, including gas and liquid. Air, steam, and water under pressure are all examples of vapors. Thus, option A is correct.
What are phases of matter?
Matter is any substance present in the form of liquid, solid, or gas. They have the property to get converted into another phase of matter under specific pressure and temperature conditions.
The vapor and air are present as an invisible gas, and water is a visible liquid that can be converted into a vapor state under high pressure and temperature condition. The process of evaporation can convert water molecules into vapor. Air and steam are used as vapor under pressure in inhalation devices.
Therefore, option A. the air, steam, and water are vapor under pressure.
Learn more about the phases of the matter here:
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