Question

why can a large lake have more thermal energy than a small glass of water at the same temperature?
because thermal energy is the total energy of all particles, and the lake has many more particles.
because cold objects always have more thermal energy than hot objects.
because temperature measures the total energy of all particles in a substance.
because the particles in the lake are moving faster than the particles in the glass.

Explanation:

Thermal energy is the total energy of all particles in a substance. A large lake has many more particles than a small glass of water. Since thermal energy depends on the number of particles (as well as temperature, which is the same here), the lake has more thermal energy.

Answer:

Because the lake has many more particles.