Ovule develops into seed after fertilization

Steps:

• Identify flower parts: stigma receives pollen, style connects to ovary, ovary contains ovules, anthers produce pollen.
• Understand fertilization: pollen tube delivers sperm to ovule's egg cell in the ovary.
• Note post-fertilization changes: fertilized ovule becomes seed, ovary becomes fruit.
• Match to diagram: label B points to ovule.

Why B is correct:

• The ovule houses the female gamete; after double fertilization, it develops into a seed containing the embryo, per angiosperm reproduction.

Why the others are wrong:

• A (likely stigma): receives pollen but does not form seed.
• C (likely anther): produces pollen for male gametes, unrelated to seed formation.
• D (likely petal): attracts pollinators, withers after pollination.

Final answer: B