Final answer:
Matting is the correct method of mounting needle art on top of a rigid board, enhancing visual appeal and protecting the artwork.
Step-by-step explanation:
The correct answer to the student's question is d) Matting. Matting refers to the method of mounting needle art by placing the artwork on top of a rigid board, often used to create a border around the artwork and protect it by separating it from the glass of a frame. This process enhances the visual appeal and ensures the longevity of the artwork. Matting typically involves cutting a mat from a material, such as archival-quality paper or board, to fit the artwork and frame size, then positioning the artwork and securing it with hinging tape or corners.