Select the most appropriate word for the given group of words.

A group of birds of one kind

The correct answer is Flock.

• Let's look at the meaning of the marked option:
  • Flock- a number of birds of one kind feeding, resting, or traveling together
• Let's look at the meanings of the other given options: 
  • Band- a flat, thin strip or loop of material put around something, typically to hold it together or to decorate it
  • Bevy- a large group of people or things of a particular kind
  • Crowd- a large number of people gathered together in a disorganized or unruly way
• Hence, from the given meanings, we find that Flock is the correct one-word substitute.