Well, you need a teddy bear and a freshly hatched duckling. The process of imprinting is more or less achieved via having the bear be the first thing the duckling sees when it wakes up.
CFCs is the answer, hope this helped you.
Trade:
a) allows societies to obtain good that they otherwise don't have. So, for example, in a society that practices trade, but which lives in a place with infertile soil, trade might be the only way to obtain sufficient food
b) trade enriches societies: the merchants could sell their goods for more than they bought them for and like this they and their cities became richer.
Answer:
demands- the relationship between prices and the corresponding quantities of a good or service that buyers are willing to purchase at any given point in time
Explanation: