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.

1. state-issued photo ids. provide them for free for those who can't afford them.

2. the system we have seems to be working nearly perfectly. seems like about 31 cases per billion votes cast

3. the national policy for hiring new employees which requires proof of eligibility to work. there are something like 20 types of identification which can be used for this.