A large stretch of land is a(n):
expanse
isthmus
hill
island

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.

all you have to do is look at the pictures to find hope this is the lesson you were also hope this .

the answer to your question is,

d. when a child was born.

-mabel < 3