Answer:
b. Entropy increases
Explanation:
The second law of thermodynamics or the second principle of thermodynamics concisely states that "The amount of entropy of any thermodynamically isolated system tends to increase over time until it reaches a maximum value." More significantly, when one part of a closed system interacts with another part, energy tends to divide evenly until the system reaches a thermal equilibrium.
The Second Law of Thermodynamics deals with the transfer of thermal energy. This means that it indicates heat exchanges that tend to equalize different temperatures (thermal equilibrium), which happens spontaneously.