Choose the correct collective noun from the options below and fill in the blanks.

A ____ of fireflies lit up the summer night.

Swarm

The correct collective noun for a group of fireflies is "Swarm."OPTION 1

Explanation:

Swarm is commonly used to describe a large group of insects, including fireflies, when they gather or fly together.

Group is a more general term and can apply to various collections of objects or organisms.

Brigade typically refers to a large group of soldiers.

Constellation specifically refers to a group of stars forming a recognizable pattern.

So, the correct sentence would be: "A swarm of fireflies lit up the summer night."