Fertilization occurs in the ovary of a flower

Steps:

• Pollen grains land on the stigma during pollination.
• A pollen tube grows down through the style toward the ovary.
• Male gametes travel via the pollen tube to the ovules inside the ovary.
• Fertilization happens when sperm fuses with egg cells in the ovules.

Why A is correct:

• Fertilization takes place in the ovary, where ovules containing egg cells are located, as defined in angiosperm reproduction.

Why the others are wrong:

• B (stigma): Site of pollen reception, not gamete fusion.
• C (style): Pathway for pollen tube growth, not fertilization site.
• D: Likely outside the pistil or incorrect location; fertilization is internal in the ovary.

Final answer: A