What tool is used to select and then copy/paste part of the second layer in the Pixlr Halloween project?

The Marquee Select tool is designed for selecting rectangular or elliptical areas of an image, making it ideal for selecting specific sections of a layer in a project. In the context of the Pixlr Halloween project, using the Marquee Select tool allows for precise selection of the area in the second layer that you want to copy. Once you’ve made the selection, it's straightforward to copy that area and paste it elsewhere.

While the other tools have their own specific uses, such as the Brush tool for painting, the Lasso tool for free-hand selection, and the Clone Stamp tool for duplicating pixels, they do not provide the same level of straightforward selection capability that the Marquee Select tool offers for defined areas. This makes the Marquee Select tool the most appropriate choice for the task of selecting and copying a specific part of the second layer.