Change there to their.
This is because "their" is the correct word to use for having possession of something.
Example: It was their house.
Answer:
have
Explanation:
my neighbors have a garden. they give us tomatoes..
You did not provide the possible answers, however, one of the major differences was that the first civilizations in the classical era had a much more elaborate and a developed political system that was often democratic and had parliaments, senates, voters, and similar, while first civilizations, often called river valley civilizations, often had absolutist monarchs.
Maybe post the excerpt so we know what the question wants?