Final answer:
To change a sprite's horizontal movement, the x-coordinate attribute should be adjusted. Increasing the x-coordinate moves the sprite to the right, while decreasing it moves the sprite to the left.
Step-by-step explanation:
If you want to change the sprite's horizontal movement in a computer program or game, you should adjust the x-coordinate attribute of the sprite. The x-coordinate determines the sprite's position on the horizontal axis of the screen. To move the sprite to the right, increase its x-coordinate; to move it to the left, decrease its x-coordinate.
This is usually accomplished by changing the value of the x-coordinate within the program's code, which could be done in various programming environments such as Scratch, Python with Pygame, or JavaScript with p5.js.