A wave is a disturbance that carries energy from one place to another.
Explanation:
Wave is a periodical deformation that can spread in time and space. The wave can transmit the energy over distance, like for example ocean waves, that can go many kilometers not moving the water. The deformation of the wave is a movement of water that goes up and down.
According to National Geographic, "Fossils are the preserved remains, or traces of remains, of ancient organisms." When you find the impression of a leaf, the leaf imprint is the preserved remains of the leaf.
