By studying the limbs and fossils of different animals, such as a horse leg and a human leg, scientists have noticed that there are similarities in their bone structures. This is evidence that their bone structures and limbs may have evolved in
similar ways.

Which statement is true about this scenario?

1. The scenario is describing a relationship known as causation.

2. The scenario is describing a relationship known as correlation

3. The scenario is describing intermediate fossils

4. The scenario is describing transitional fossils