Which option allows adjustments to the space surrounding an image in a graphics editing program?

The correct choice is canvas size, which refers to the overall dimensions of the work area in a graphics editing program. Adjusting the canvas size allows you to modify the space surrounding the image, effectively giving you more room for design elements or adjustments. This can be useful for creating backgrounds, adding text, or positioning other graphics around the original image.

Increasing the canvas size provides additional space without altering the actual image itself, enabling a more comprehensive layout. Conversely, changing the image size would resize the image and not create additional space around it. Layer styles involve effects applied to specific layers, such as shadows or glows, and do not manipulate the surrounding area. Margin settings typically relate to text layout in word processing rather than direct image editing. Therefore, canvas size is the most appropriate option for modifying the area around an image in graphic design.