In Pygame, when building a character, why are we using x,y when we are already giving the width and height?

the pygame code

I am not understanding why we are putting x,y when we already have width and height for the character. Just wanted to know what's the use of x,y in here?

source https://stackoverflow.com/questions/75258780/in-pygame-when-building-a-character-why-are-we-using-x-y-when-we-are-already-g