The answer is "classical conditioning".
Classical conditioning alludes to a learning method in which a naturally intense jolt (e.g. nourishment) is combined with a formerly unbiased boost (e.g. a ringer). It likewise alludes to the taking in process that outcomes from this matching, through which the unbiased boost comes to evoke a reaction (e.g. salivation) that is generally like the one inspired by the strong jolt.