when you make a choice, the experience from what would have been your second option is called

trade-off.
supply.
demand.
opportunity cos
you can either go to a movie or go bowling. if you choose the movie,

you will spend far more on the movie than you would on bowling.
you will have made the choice that has the most benefit.
your opportunity cost is the amount of money you pay for the movie.
your opportunity cost is the time and experience of bowling.
the fact that we cannot have everything we want is caused by