That depends— is this an imperative? Imperative: Everyone, bring your own food. Statement: Everyone brings their own food. // Everyone should bring their own food // Everyone will bring their own food, etc.

Hi, The correct and most natural sentence is: Everyone bring their own food. Explanation: "Everyone" is singular, but in modern English, we often use "they/their" as a gender-neutral singular pronoun. "Your" sounds off here because you're mixing second person ("your") with third person ("everyone").

Everyone brings his/her own food.

both are correct depending on the context - who are you addressing? Both communicate that everyone needs to BYOF

Both 1. addressing indivdually 2. addressing collectively