What is the meaning of opportunity cost? Give an example of this concept

the loss of other alternatives when one alternative is chosen

the pogroms became known as kristallnacht, the "night of shattered glass," for the shattered glass from the store windows that littered the streets. the morning after the pogroms 30,000 german jewish men were arrested for the "crime" of being jewish and sent to concentration camps, where hundreds of them perished.

i believe it to be a democracy