Kerry’s manager asks her to head up a team reviewing office protocols. Kerry is in a great mood, having received a substantial bonus last week. This indicates that experiences lead us to be more responsive to positive information.

positive              

Explanation:

Positive experience: The term "positive experience" is described as an experience that individual posses having different memories of his or her life. An individual who is encountering "positive experience" enjoys various stimulating events, feels alive, or love to get encouraged. However, these experiences make a person feels comfortable, to have good self-esteem and leads to perform in different tasks skillfully. Due to the previous experience, a person will be more responsive towards situations that include such characteristics.

In the question above, the given statement signifies the positive experience.  

i think it is the third one.

answer; the hypothalamus;