Option 1: Fragmentation is a form of asexual reproduction where an organism breaks into fragments, and each fragment grows into a new organism. It does not involve the fusion of gametes, so it is not a form of sexual reproduction.
Option 2: Haemapheoditism is the correct answer. It is a form of sexual reproduction found in some hermaphroditic species where individuals exchange sperm during mating. This process involves the fusion of gametes from two different individuals, leading to the production of offspring with genetic variation.
Option 3: Budding is a form of asexual reproduction where a new organism develops as an outgrowth of the parent organism. It does not involve the fusion of gametes, so it is not a form of sexual reproduction.
Option 4: Fission is a form of asexual reproduction where an organism splits into two or more parts, and each part regenerates into a new individual. It does not involve the fusion of gametes, so it is not a form of sexual reproduction.
Therefore, the correct answer is option 2, Haemapheoditism. It is a form of sexual reproduction involving the exchange of sperm between hermaphroditic individuals.