WILL GIVE AND EXTRA POINT SPLZ ANSWER THIS AS SOON AS POSSIBLE By comparing birthrates and death rates, demographers figure out .

1.population density

2.where people are likely to move

3.why people migrate

4.population growth
i think its 4 or 1

by using  production possibilities graph.  opportunity costs are key expenses in financial matters and are utilized as a part of registering money saving advantage investigation of a venture. such expenses, be that as it may, are not recorded in the record books but rather are perceived in basic leadership by processing the money costs and their subsequent benefit or misfortune.

that is alot i do not no