The thermal energy content of beaker 1 with a larger volume of water will be greater than that of beaker 2 with a smaller volume of water, provided that both beakers are at the same temperature.
Thermal energy is directly related to the amount of substance present, in this case, water. The more water molecules there are, the greater the thermal energy content. Each molecule has a certain amount of kinetic energy associated with its random motion, and when you have more molecules in beaker 1, the total thermal energy is higher compared to the smaller number of molecules in beaker 2.
It's important to note that the temperature of the water is assumed to be the same for both beakers. Temperature is a measure of the average kinetic energy of the particles, so if the temperature is equal, the thermal energy content will primarily depend on the quantity (mass or volume) of the substance.