John says, "Please pass the salt." Ralph passes the salt. "Thank you," says John. John's request precedes a behavior (salt passing) that is reinforced ("Thank you"). Thus, the request "Please pass the salt" is a for passing the salt.

discriminative stimulus

Explanation:

A discriminative stimulus is used to reinforce a behavior in presence of a stimulus.In other words it is used to control the behavior in presence of a stimulus.Since the behavior has been reinforced in the past by the presence of the Stimulus.

For Example: A dog starts salivating when the bell is ringed.So here the bell is the Stimulus

the minoan civilization flourished in the middle bronze age on the island of crete located in the eastern mediterranean from c. 2000 bce until c. 1500 bce. with their unique art and architecture, and the spread of their ideas through contact with other cultures across the aegean, the minoans made a significant contribution to the development of western european civilization as it is known today. labyrinth-like palace complexes, vivid frescoes depicting scenes such as bull-leaping and processions, fine gold jewelry, elegant stone vases, and pottery with vibrant decorations of marine life are all particular features of minoan crete.  

so basically their unique way of ding arts, as well as architecture.