Libby is drawing. She places her red pencil behind her ear to use another colored pencil. After a minute Libby doesn’t feel the pencil behind her ear anymore and she forgets it is there. Libby is most likely experiencing

Habituation.

Explanation:

Habituation refers to the psychological learning mechanism where the reaction to a stimulus is reduced after repeated exposure to it. This definition suggests that because of repeated exposure to it, an organism can tend to ignore a stimulus. It happens in everyday life but we still do not realize it to a large extent. As per the question,  Libby doesn’t feel the pencil behind her ear as she left it there and forgot about it is an example of habituation.

u.s. presidents buried at arlington national cemetery include john f. kennedy and william howard taft. the kennedy gravesite is the final resting place not only of the former president, but also his wife jackie kennedy, his two brothers robert and edward kennedy, as well as a memorial to his brother joe jr.good luck

explanation:

a: social security and social programs