Question

Jack is working with layer masks on an image, but he is worried that he may damage the image. Which of these would be an accurate fact about layer masks?
The layer mask permanently changes all parts of an image.
The layer mask changes some parts of a layer and affects some parts of an image.
The layer mask permanently changes parts of a layer and affects all parts of an image.
The layer mask hides parts of a layer without damaging any part of an image.

Answer 1

The layer mask hides parts of a layer without damaging any part of an image.

It is possible to add a mask to a layer and uses the mask to hide portions of the layer and reveal the layers below. This is a valuable compositing technique for combining multiple photos into a single image or for removing a person or object from a photo.