Soil layers diagram for educational labeling and coloring activity.

Let’s look at the soil layers from top to bottom.

The very top layer, right under the grass and roots, is called humus. It’s dark and full of decaying leaves and plants — that’s what makes it rich for growing things.

Just below humus is topsoil. This is where most plant roots grow. It’s still pretty dark and has lots of nutrients.

Below topsoil is subsoil. It’s lighter in color and doesn’t have as many nutrients. Roots don’t go here as much.

At the very bottom is bedrock. That’s solid rock — no dirt, just hard stone. Plants can’t grow through this.

Now let’s match them to the arrows:

- Top arrow (just under grass) → humus
- Second arrow down → topsoil
- Third arrow → subsoil
- Bottom arrow (with big rocks) → bedrock

Final Answer:
Top to bottom labels:
1. humus
2. topsoil
3. subsoil
4. bedrock