Question

rabble means :
a dense growth of bushes
a disorderly crowd of people
a fleet of small craft
a collection of star systems

Explanation:

"Rabble" is a noun. By referring to standard English dictionaries (e.g., Oxford English Dictionary), it is defined as a disorderly or riotous crowd of people. The other options: "a dense growth of bushes" might be related to a different word like "thicket"; "a fleet of small craft" is about boats and not the meaning of "rabble"; "a collection of star systems" is an astronomical concept and not relevant to the word "rabble".

Answer:

B. a disorderly crowd of people