As a a kid, your sibling thought it would be really fun to put spiders down the back of your shirt. You became very afraid of spiders over time. Now, just the word "spider" makes you start to sweat. This is a good example of conditioning.

operant conditioning

Explanation:

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This is a good example of CLASSICAL conditioning.

Explanation: in Psychology, classical conditioning can be defined as a learning process in which a previously neutral stimulus (such as a bell) is paired with a potent stimulus (such as food in the case of a dog), so that the neutral stimulus comes to elicit a conditioned response (salivation) similar to the one elicited by the potent stimulus.

industry had made the u.s. the richest nation in the world at this time. the second industrial revolution caused growth in industry and transportation, which allowed increased trade between nations.