Question 3
After fertilisation, what does the ovary wall become?
The right answer is the one marked above.
The pericarp. The ovary itself becomes the fruit, and its wall becomes the pericarp around it.
The seed coat comes from the integument of the ovule, and the embryo from the zygote — each is a real transformation, just from a different starting part. The stigma is among the parts that fall away.