The correct answer is A. Asexual reproduction.
Explanation: Hydra reproduces by a process called budding, which is a form of asexual reproduction. In this process, a new individual (bud) forms on the body of the parent organism. The bud eventually detaches and becomes a new organism that is genetically identical to the parent. Since no gametes (sperm or egg cells) are involved, and the offspring is a clone of the parent, it is considered asexual reproduction.
B. Sexual reproduction involves the fusion of male and female gametes (sperm and egg), which is not the case in budding.
C. Regeneration is the process where an organism can regrow lost or damaged body parts, but it is not how Hydra produces offspring.
D. Parthenocarpy refers to the development of fruit without fertilization, which is unrelated to Hydra’s reproductive method.