The first sentence is referring to a secondary reinforce while
the second sentence is referring to primary reinforce. A primary reinforce are
usually base on biological things such as the water we drink or food that we
eat while the secondary reinforce is base on the conditions that humans is
reinforcing such as money or grades.
It is essential to know how to write
Answer:
The Middle Colonies' chief export was grain, in addition to other crops such as corn, vegetables, fruit and livestock.
Explanation:
Economic equilibrium is a condition or state in which economic forces are balanced.