Which type of economy is known for using the barter
system?

Explanation:

A barter economy is a cashless economic system in which services and goods are traded at negotiated rates. Barter-based economies are one of the earliest, predating monetary systems and even recorded history. People can successfully use barter in many almost any field.

in griswold v. connecticut (1965), the supreme court ruled that a state's ban on the use of contraceptives violated the right to marital privacy.