The image displays a sewing technique with four options. Identify the correct option based on the visual representation.

Analysis:

The image shows a piece of fabric folded over and stitched. The green strip is folded over the blue piece, and a dashed line indicates stitching along the edge of the green strip, creating a clean, finished edge on both sides.

Let's evaluate the options:

• 1. стачной (seam): This refers to a seam joining two pieces of fabric, which is not what is primarily depicted.
• 2. запошивочный (French seam/flat-felled seam): This technique involves enclosing the raw edges within the seam, creating a very neat finish, and matches the visual.
• 3. в подгибку с закрытым срезом (hem with a closed edge): While this involves folding and stitching, the illustration specifically shows a double fold on one edge to enclose the raw cut, characteristic of a French seam or flat-felled seam.
• 4. двойной (double): This is a general term and not specific enough to describe the technique.

The visual most accurately represents a type of seam where the raw edges are enclosed, ensuring a neat finish on both the right and wrong sides. This is characteristic of a French seam or a flat-felled seam (запошивочный шов in Russian).

Conclusion:

The technique shown in the image is a French seam or flat-felled seam, which is known in Russian as запошивочный.

Ответ: 2. запошивочный