Which part of the flower becomes a fruit?

The fertilized ovule becomes the seed, and the ovary becomes the fruit. Petals are also important parts of the flower, because they help attract pollinators such as bees, butterflies and bats. You can also see tiny green leaf-like parts called sepals at the base of the flower.

the ovule and ovary

Explanation:

the fertilized ovule becomes a seed and the ovaty becomes the fruit

b is the best answer for this question.