Correct Answer: Retrogression

Solution : The correct choice is the f irst option.

Deterioration refers to the process of becoming worse or declining in quality, condition, or strength over time.

Retrogression signifies a backward movement or a return to an earlier, less developed, or less advanced state. It suggests a regression or decline from a previously attained level of progress or development.

The meanings of the other options are as follows:

• Demonstration refers to the act of showing or explaining how something works, the validity of an idea or theory, or making something evident through a presentation.
• Malfunction describes the failure or improper functioning of a machine, system, device, or part of it.
• Ramification refers to the consequence of an action, decision, or event, often indicating a complex series of outcomes.