Pets who learn that the sound of an electric can opener signals the arrival of their food illustrate a. cognitive learning. b. operant conditioning. c. classical conditioning. d. observational learning

Which of the following was discovered in the piedmont region of north carolina in 1799?

Which groups of people most directly benefited from song innovations in the song dynasty‘s open border policy?

Read the following: (1) liz has become more responsive to her partner's advances since a really beautiful woman moved in next door; (2) unable to accept his desire for other young men, 15-year-old juan immerses himself into his studies; (3) shauntel tells people that her coworker mary dislikes her; though if she were honest, shauntel would realize that it is actually she who dislikes mary; (4) "ben's nasty; he's disgusting," says renee; but renee secretly finds ben attractive. describe the defense mechanism he or she is using.