Flower is the main reproductive part of the plant.
It is made up of four whorls and out of them two outer whorls are the calyx and corolla.
The inner two whorls are androecium or the male part of the flower and gynoecium or the female part of the flower.
All the whorls together form the main structure of a flower which helps with fertilization in plant resulting in the formation of seed from the ovule and fruit from the ovary.
Angiosperms are the flowering plants in the plant kingdom.