Final answer:
The outer layer of Earth, known as the crust, is most similar to the peel of a banana in its protective function and composition of multiple layers.
Step-by-step explanation:
The outer layer of Earth is most similar to the peel of a banana.
In both cases, the outer layer acts as a protective covering. Earth's outer layer, called the crust, is the thin and solid outermost layer of the planet. Similarly, the outer peel of a banana provides protection for the fruit inside.
Additionally, like the Earth's crust, the outer peel of a banana is made up of different layers of material.