Question

image editing tools that change the appearance of an image or part of an image by altering the shades and colors of the pixels in some manner. these tools are used to increase brightness and contrast as well as to add a wide variety of textures, tones and special effects to a picture.
filters
merging
coffers
tools

Explanation:

Filters are image - editing tools that change an image's appearance by altering pixel shades and colors, increasing brightness/contrast, and adding textures, tones, and special effects. Merging combines images, "Coffers" is unrelated, and "Tools" is too general.

Answer:

A. Filters