Answer:
Monoecious- ----A. has megasporangiate and microsporangiate flowers on the same plant
Dioecious---- D. has megasporangiate and microsporangiate flowers on different plants
Angiosperm----- C. produce flowers and fruits
Gymnosperms--- B. produce seeds that are not protected by the ovary Explanation:
Monoecious plant are plant whose male and female flower are located on the same plant. They can self fertilize and produce viable embryos example is cowpea,soybean.
Dioecious- The are plant whose male and female flowering are located on different plant they are naturally cross pollinated. They male pollen are usually carried by wind or insect to fertilize the female part. Example is pawpaw
Angiosperm are plant who produce fruits and seeds. The seeds develops from fertilized ovule and the fruits from the ovary example are grasses,roses
Gymnosperms are plant with naked seeds, they do not have flowers or fruits and their seed are not protected with the ovary. example is pir,cycads