response to food
Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a food stimulus; food is anything which, when taken into the body, serves to nourish or build up the tissues or to supply body heat.
GO:0031667
response to nutrient levels
is_a
GO:0042221
response to chemical
is_a