What is the purpose of the enclosed seeds in a fruit found on a flowering plant?

The primary purpose of the seed in a fruit is reproduction.

A seed is a matured, fertilized ovule of a flowering plant and it contains an embryo  by which a new plant can grow.

 Plants are able to perpetuate themselves mainly through sexual means through seeds which when they germinate become seedlings. Seedlings facilitate the propagation of plants.

Seeds also serve as diaspores or dispersal units themselves . Many seeds have adaptations such as fine hairs, parachutes, hooks and water repellent surfaces which enhance their dispesal.

the correct answer is b

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.