Which of the following measures more?

The measure of 1 gallon is the largest among the choices provided. A gallon is equivalent to about 3.785 liters, which is significantly more than 1 liter and 500 milliliters. In the context of other common measurement conversions, 1 quart is equal to approximately 0.946 liters, making it smaller than 1 gallon as well. Since 1 gallon is the largest volume in the U.S. customary system of measurement, it clearly measures more than the other options listed. Understanding these basic conversions helps to compare different volumes effectively.