Which of the following is a primary characteristic of a "Notch" in garment construction?
1
It marks the place where two edges should be aligned when sewing the garment.
2
It is used to create small, visible slits to allow a garment to stretch.
3
It is used as a decorative element to add style to the garment.
4
It refers to a hidden mark used for pattern alignment in the body of the fabric.