Afamily sets up a sprinkler system to make sure garden plants get enough water. which characteristic of early river civilizations does this system resemble?

The correct answer is irrigation. The early civilizations were river civilizations exactly because they used irrigation systems to get water from a source, that is a river, to the land that needs to be watered for various purposes. Here we see that except on a smaller scale and not of that high of an importance for the community. The person takes water from a water source and leads it to the garden.