If fossil species A is consistently recovered from geological deposits beneath layers containing fossil species B, then A is considered older than B. This dating technique is based on the principle of:

The question is incomplete. The complete question is:

Question: If fossil species A is consistently recovered from geological deposits beneath layers containing fossil species B, then A is considered older than B. This dating technique is based on the principle of:

a. Nitrogen analysis

b. Superposition

c. Fluorine-analysis

d. Paleomagnetism

e. Radioactivity

Answer:

b. Superposition

Explanation:

Various layers of sedimentary rock occur naturally in the sequence of their deposition. According to the principle of superposition, the more recent layers of sedimentary rock are present on top of the older and the earlier ones. In this technique, most fossils are dated by their relative position in sedimentary rock. Therefore, when the fossil species A and B are dated according to the relative position of the layers in which they are found, the principle of superposition is applied.