1) The document discusses five key questions about the nature of emotions: what an emotion is, what causes emotions, how many emotions there are, what functions emotions serve, and the difference between emotions and moods.
2) An emotion is described as a short-lived feeling-arousal-purposive-expressive phenomenon that helps us adapt to opportunities and challenges through important life events. Emotions have cognitive, biological, motivational, and social-expressive components.
3) There are believed to be six basic emotions - fear, anger, disgust, sadness, joy, and interest - that motivate different types of adaptive behaviors in response to different stimuli or life events.