Correct Answer: shiver

Solution : The correct choice is the third option .

Shudder means to tremble suddenly, often as a result of fear, horror, or revulsion. Shiver similarly means to shake or tremble, often due to cold or strong emotions. Both words describe a quick, involuntary trembling motion.

The meanings of the other words are:

• Shackle : This means to restrain or confine, often with physical restraints.
• Shrug : This means to raise one's shoulders slightly, often indicating uncertainty, indifference, or a lack of concern.
• Shimmer : This means to shine with a flickering or wavering light, often with a subtle, sparkling quality.