Researchers found that people easily acquire a conditioned fear response to pictures of snakes and spiders when the slides were paired with a mild electric shock. however, people did not easily acquire a conditioned fear response of pictures of flowers and mushrooms when these images were paired with a mild electric shock. according to the text discussion, this is an example of:

european feudalism was a combination of legal and military customs in medieval europe that flourished between the 9th and 15th centuries. broadly defined, it was a way of structuring society around relationships derived from the holding of land in exchange for service or labour.

japanese feudalism. the era of feudalism in japan took place from the 12th through 19th centuries. during that period local rulers, either powerful families or military warlords, dominated the land, while the emperor was merely a figurehead and not a significant political presence.