Jessica's mother is afraid of snakes. Although Jessica has never actually seen a snake, her mother has told her time and again to be careful to look out for them when she is walking. Now Jessica has an intense fear of snakes and refuses to walk in the grass. This is an example of .

Which of the following was a key accomplishment of the people of songhai? a. they had a strong military and became the largest empire in west africa. b. they established a center of islamic scholarship. c. they worked with iron and prospered from the gold-salt trade. d. they dominated in the trade of ivory, enslaved people, and animal skins.