When a middle school student is able to demonstrate that he/she is able to hear a string of digits (1, 2, 3, 4, etc.) and then repeat the string in reverse order several seconds later, the child is indicating that he/she is developing?

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.

the density would be a smaller number.