The process of relative dating is illustrated through six index fossils, represented by shells which are named as A, B, C, D, E and F.
Location 1: It has five layers of rock. The index fossils present from top to bottom layer are A, B, C, D and F respectively.
Location 2: It has three layers of rock. The index fossils present from top to bottom layer are A, C and D respectively.
Location 3: It has four layers of rock. The index fossils present from top to bottom layer are A, D, E and F respectively.