C'est à toi de choisir.
Here's a breakdown:
* C'est: This is a contraction of "c'est" meaning "it is"
* à toi: This means "to you" or "yours"
* de choisir: This means "to choose"
So, the whole phrase literally translates to "It is to you to choose," but in English, we would say "It's your choice."
Here are some other ways to say it, depending on the context:
* C'est ton choix. ("It's your choice.")
* Tu as le choix. ("You have the choice.")
* C'est toi qui décide. ("You are the one who decides.")
* Fais ce que tu veux. ("Do what you want.")
Remember that the best way to say it will depend on the specific situation and the tone you want to convey.