Question

practice it
inability to reverse the direction of a sequence of events to their starting point
reversibility
invariance
disequilibrium
irreversibility
inhomogeneity

Explanation:

Reversibility is the ability to reverse a sequence of events. Invariance refers to something remaining unchanged. Disequilibrium is a state of imbalance. Inhomogeneity means lack of uniformity. Irreversibility is the inability to reverse the direction of a sequence of events to their starting - point.

Answer:

D. irreversibility