In which of the following swarming is found?

The correct option is C In locust
A group of bees, social wasps, or ants, when migrating with a queen to establish a new colony is called as swarming.

Locusts are the swarming phase of certain species of short-horned grasshoppers in the family Acrididae. In the solitary phase, these grasshoppers are innocuous, their numbers are low and they cause little economic threat to agriculture.

Therefore, the correct answer is option C.