Could someone answer please?

They can provide comic relief in a tense scene, or do the opposite and increase the tension. A secondary character may come in the form of a mentor, offering information to a character when they need it, or in the form of a love interest, best friend, colleague, relative…pretty much any character type can be a secondary character.For example, if you’re writing a mystery, your main character could fall out with their friend/love interest/mentor that’s trying to help them solve the mystery. That person returns later, with information that helps move the main plot along. This subplot develops their relationship and builds on the mystery.

Explanation:

the group received an extra pound of butter for christmas.

the annex was delighted to hear that we'll all be receiving an extra quarter pound of butter for christmas.

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