Why might it be adaptive to avoid food or drink that taste sour?

Avoiding food or drink that tastes sour is an adaptive behavior because it can help prevent the consumption of spoiled or toxic substances. Sourness is often associated with the presence of acids, which can indicate that food has begun to decompose or has been contaminated with bacteria. By avoiding sour-tasting items, individuals can reduce the risk of foodborne illness and other health problems.

Additionally, sour tastes can be a sign of unripe fruits or vegetables, which may not be as nutritious or palatable as ripe produce. Avoiding sour-tasting foods can help ensure that individuals consume foods that are at their peak of ripeness and nutritional value.

Overall, the avoidance of sour-tasting foods is an adaptive behavior that helps protect individuals from consuming spoiled, toxic, or unripe substances, promoting overall health and well-being.