Correct spelling, explanation: position is the correct form because the word comes from Old French posicion, which is also spelled with one s; the only thing that changed in this spelling was c to t. Possition is incorrect because there is no reason to double this consonant. Therefore position is the correct form.

Definition of position:
noun, the place where something or someone is; stance
Please stay in this position and don’t move until scanning is over.
They published the government position on the issue, have you seen it already?

Incorrect spelling, explanation: possition is a wrong spelling because double s is unnecessary here (due to pronunciation). Position spelling comes from the Old French posicion, so it explains the correct English spelling. The only correct form here is position.

Incorrect spelling

Incorrect spelling

Incorrect spelling