Final answer:
The Reign of Terror was a violent period during the French Revolution lasting from 1793-1794, marked by mass executions and exemplified by the widespread use of the guillotine.
Step-by-step explanation:
The period known as the Reign of Terror was a notably turbulent and violent phase during the French Revolution. It began in 1793, following the execution of King Louis XVI, and lasted until 1794. The revolutionary government, led predominantly by Maximilien de Robespierre and the Committee of Public Safety, endorsed repressive measures against those considered enemies of the revolution. The guillotine became a pervasive symbol of the terror, and approximately 50,000 people were executed. This dark chapter of the French Revolution culminated with the execution of Robespierre himself, in July 1794, effectively ending the reign of extreme revolutionary violence.
The correct answer to the student's question about the period of the Reign of Terror is option 3) 1793-1794.