Please help me if u dont knw dont answer please and no links 20 points will give the crown

scarcity: the fourth one (a condition in which the quantity...)

trade off: the first one (giving up one or all...)

opportunity cost: the second one (the value of the second-best alternative...)

marginal analysis: the fifth one (comparing the additional costs and...)

marginal cost: the third one (the additional cost of making a change or choice)

I learned this last year but I'm pretty sure all of these are correct! I hope this helps!

the correct answer is:   the domino theory states that if one country in a region came under the influence of communism, then the surrounding countries would follow in a domino effect.