What change may people feel when humidity is high?

Correct answer: Heat may feel more sticky

Humidity is the amount of water vapour present in the air. When humidity is high, the air already contains a great deal of moisture, so sweat evaporates more slowly from the skin. Because evaporation helps remove heat from the body, slower evaporation can make a warm day feel sticky, muggy, and more uncomfortable. The actual air temperature has not necessarily increased; the body simply loses heat less efficiently. Humidity can also vary with temperature, but high humidity does not make every weather condition produce the same sensation.

Option A is correct because high humidity may make heat feel more sticky and oppressive. Option B is false because cold does not always turn into ice, and humidity alone cannot guarantee that. Option C is false because air does not disappear when it is humid. Option D is false because humid air can be associated with clouds and rainfall rather than making rain impossible. The key link is humidity, slow sweat evaporation, and reduced comfort.