Answer: Option (B) is the correct answer.
Explanation:
An approach in which specific calculation, investigations, or work etc is done related to the topic and a generalized conclusion is framed based on investigation for the same is known as inductive approach or inductive reasoning.
Thus, studying about all kinds of leaves shows that Martha has specifically investigated types of leaves in order to distinguish between all the types of leaves.
Hence, we can conclude that Martha's research is employing inductive reasoning.
