A 'smart gel' is a:

Detailed Solution:

The correct answer is “material mimicking life system”.

A smart gel refers to a type of material that can respond to changes in its environment, such as temperature, pH, or light, by altering its properties like shape, size, or solubility. These gels are designed to mimic biological systems' ability to sense and respond to external stimuli, making them useful in various technological and biomedical applications.