Final answer:
The agora was a central public space for political meetings and buying and selling goods, but Greek farmers did not plant crops there; farming occurred outside of city centers.
Step-by-step explanation:
The area known as the agora in ancient Greek city-states was a central public space that had multiple functions. Importantly, Greeks held political meetings and bought and sold goods in the agora, both of which were common activities there. However, Greek farmers did not plant crops in the open area of the agora; instead, the agora was similar to a marketplace and public square. Farming was typically conducted in rural areas outside of city centers. Therefore, the option indicating that Greeks farmers planted crops in the open area is the activity that did not take place in the agora.