Complete the sentence with the most appropriate word or phrase out of the given options.
The boy was frightened by the ____ of elephants that came running towards him.

herd

The most appropriate word to complete the sentence is herd.

The other options are not as accurate. Group suggests that the elephants were simply a collection of individuals, but this is not the case. Number suggests that the elephants were simply a quantity, but this does not capture the sense of a group of animals moving together. Bunch suggests that the elephants were a disorganized group, but this is also not the case. Herd is the best option because it suggests that the elephants were a group of animals that were moving together in a coordinated fashion.