* The outermost layer of Earth: This is called the crust. It's a relatively thin layer of solid rock that makes up the continents and ocean floors.
* The topmost layer of Earth's crust: This is called the soil. It's a mixture of weathered rock, organic matter, water, and air that supports plant life.
So, the answer to your question depends on the context. If you're asking about the outermost layer of Earth, it's the crust. If you're asking about the layer that supports life, it's soil.
