Answer:
The correct answer will be flower.
Step-by-step explanation:
A flower is a reproductive organ formed by the modification of the leaves.
The flower carries reproductive structures like stamens and carpels which produces gametophytes. Male gametophyte or pollen grains and female gametophyte or egg cell are produced in the flower which during fertilization undergo crossing over in the pachytene phase of meiosis I and produces genetically different offspring.
Thus, the flower is the correct answer.