The second branch of government according to the constitution is the Executive Branch. I think
The dictionary has the answer for you:)
So that they know what the world is about and that they become aware of what is happening out or what will happen if they do certain things.
The correct answer is number 2. Ambivalence.
Ambivalence refers to the state of having mixed feelings or different ideas about something or a person. In the given situation, Brian had the feeling of ambivalence, since a passerby had smiled on him, which possibly made him think about different ideas that the person may like him or knows him.