Fossils are the remains of plants and animals that lived millions of years ago. There are several types of fossils that form in different ways.
For example, a "mold" fossil of a plant may form when a plant dies and is buried by mud and sand. Water causes the plant parts to dissolve, but a
hollow space called a mold that is in the shape of the plant remains in the mud and sand. Over time, the mud and sand turn into hard rock.
Eventually, the rock may break and reveal the mold fossil of the plant.
According to the passage, how does water help a fossil form?
O 1. by causing a rock to break
O2. by burying a plant after it dies
3. by dissolving buried plant parts
O4. by turning mud and sand into rock