An object was placed into a container of water the arrow shows the thermal energy is flowing from the water to the object what is the valid conclusion

The valid conclusion is:

Explanation:

The answer choices are:

Thermal or heat energy always flows from the hotter substances to the cooler substances.

Thus, since the arrows show that the thermal energy is flowing from the water to the object, the water is losing thermal energy and the object is gaining thermal energy.

When an object gains thermal energy, and there is not involved a change of phase, the temperature of the object increases. Thus, the temperature of the object is increasing.

On the other hand, since water is losing thermal energy, and there is not involved a change of phase, the temperature of the water decreases.

Therefore, the correct conclusion is described by the option A:

the dissolution of polymer can be thermodynamically described in 2 steps.