Why are the ancient cities of Harappa, Mohenjo-Daro, and Kalibangan considered to be part of the same civilization? They are located close together.

They are similar in their construction.

Harappan documents describe the settlements as sister cities.

Harappan historians have written stories about the leaders of these cities.

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.

it should be d or b but i'm sure it's d

answer; the automatic system because it is a "gut reactor"