The correct answer is option 4, Sleet. Condensation is the process by which water vapor in the air turns into liquid water. It occurs when warm air containing water vapor comes into contact with a colder surface, causing the vapor to lose heat and transform into droplets of water.

Option 1, Dew, is a form of condensation that occurs when the temperature of the surface drops below the dew point temperature, causing moisture in the air to condense and form water droplets on objects like grass or car windows.

Option 2, Fog, is also a form of condensation. It occurs when warm, moist air comes into contact with cool air, causing the moisture to condense and form tiny water droplets that create a cloud-like appearance close to the ground.

Option 3, Frost, is another form of condensation. It happens when water vapor in the air freezes directly on a cold surface without first forming liquid droplets. This leads to the formation of ice crystals, which give objects like windows or plants a white, frosty coating.

Therefore, the correct answer is option 4, Sleet, as it is not a form of condensation. Sleet occurs when raindrops fall through a layer of freezing air and freeze into ice pellets before