Is it choice or choise?

Excuse me, but I've come across a bit of a dilemma in my writing. I'm not entirely sure which spelling is correct for the word that signifies the act of selecting or making a decision. Should I use "choice" or "choise"? It seems to me that both spellings might be valid, but I want to ensure that I'm adhering to proper grammar and spelling conventions. Could you please clarify which one is the correct spelling and why? I'd greatly appreciate your insight on this matter.