Layering adds depth to a picture that is flat. This can be done by adding a foreground subject, middle ground subject, and a background subject. Layering makes the image feel more 3D.
The picture on the left uses a mower in the foreground and the combine in the background. This picture could be made better if it had a third layer. The picture on the right has a row of goats in the foreground, another row in the midground and a goat in the background that is jumping on the wall.
The picture on the left has three different layers of books. The picture on the right has 2 girls at different spots in the foreground, a girl running up to the net in the midground, and a line of girls in the background.
The picture on the left has a pond in the foreground, grass and trees in the midground and a barn and silo in the background. The trees on the edge of the picture reflect onto the pond and give it a frame. the picture on the right has several different layers of eggs.
The picture on the left has grass in the foreground, ponds in the midground, and trees in the background. The picture on the right has kids in the foreground, midground, and background.
The picture on the left has different layers of desks and kids. The picture on the right has a layer of eggs in the foreground, the denester in the midground, and the egg belt in the background.
The picture on the left has goats in the different levels.
The picture on the right is the featured image. It has a person in the foreground, buses and people in the midground and the hatchery in the background.