The correct answer is D. Increasing.
Entropy is a measure of the disorder or randomness of a system. The second law of thermodynamics states that the entropy of an isolated system can never decrease over time, and is constant if and only if all processes are reversible. Isolated systems spontaneously evolve towards thermodynamic equilibriumâthe state of maximum entropyâand there is always a tendency for physical processes to become irreversible.
The universe is considered to be an isolated system, and therefore the entropy of the universe is always increasing. This means that the universe is becoming more and more disordered over time.
Option A is incorrect because entropy is always increasing, not decreasing.
Option B is incorrect because entropy is not zero.
Option C is incorrect because entropy is not constant.
I hope this helps!