The kinetic molecular energy of a mass is the average kinetic energy of the particles that make up the mass. The faster the movement of the particles the more the kinetic molecular energy and the more separated are the molecules from one another.
In a solid the molecules are close together and form regular patterns, this means that their kinetic molecular energy is low, therefore, the limestone has less kinetic molecular energy.
The slime is a solid that has low viscosity, this means that flows more easily than limestone. This means that this object has more kinetic molecular energy than the limestone.
The hot coffee has heat energy added to its molecules which increases the temperature. Since the temperature is a measure of the average kinetic energy of the molecules the more the temperature the more the kinetic energy. Since the coffee is hotter than the slime this means that the coffee has more kinetic molecular energy.
The helium balloons are composed of gas. Gases have more kinetic molecular energy since their molecules are further apart and the interactions between them are very low.