Answer:

A mob is defined as a large and disorderly crowd of people who are often noisy and violent. In this context, the term "rabble" is used to refer to a mob. The correct answer to this question is option 'A' - Mob.

Explanation:

- Definition of "rabble": The term "rabble" refers to a disorderly crowd or mob. It is often used to describe a group of people who are loud, unruly, and disruptive.

Understanding the options:

- Option A - Mob: A mob is a large and disorderly crowd of people. They are often noisy and can be violent. Mobs can gather for various reasons, such as protests, riots, or demonstrations. They can cause chaos and disruption in their surroundings.

- Option B - Noise: While noise can be associated with a mob, it does not capture the essence of disorder and violence that is implied by the term "rabble." "Noise" refers to sound or a loud disturbance, but it does not necessarily imply a disorderly crowd.

- Option C - Roar: "Roar" refers to a loud, deep sound, usually made by animals or a crowd. While a mob can produce a roar, it does not encompass the full meaning of "rabble," which includes disorder and violence.

- Option D - Rubbish: "Rubbish" refers to waste or garbage. It does not relate to the concept of a disorderly crowd or mob.

Conclusion:

Based on the definitions and understanding of the options, the correct answer is option 'A' - Mob. This option best captures the meaning of "rabble" as a disorderly and often violent crowd.