Removal of water vapour from the air in stored food grains is

Answer: Option C

Removal of water vapour from the air in stored food grains is Dehumidification.
Dehumidification is a highly energy-intensive process, especially in humid climates and for building typologies that require strict space humidity set points.
Sub-cooling of air to condense out the moisture using chilled water or refrigerant is the most common method for dehumidifying.