without hope or encouragement; depressing; dreary:

at the same time:

to form or make, especially by concentrated effort:

any complete change in appearance, character, circumstances, etc.

a person who prefers calm environments, limits social engagement, or embraces a greater than average preference for solitude.

an outgoing, gregarious person who thrives in dynamic environments and seeks to maximize social engagement.

a person as an embodiment of a collection of qualities:

the aggregate of features and traits that form the individual nature of some person or thing

What is the Big Idea of this unit?