The organisms use different methods for reproduction. The reproduction process in Hydra is called budding.
Budding is the asexual mode of reproduction. In budding, a genetically identical new organism grows attached to the body of the parentand separates on maturity. In the process of budding, a bud develops as an outgrowth due to repeated cell division at one specific site. In Hydra, there is no reproduction through multiple fission.
Thus, the correct answer is option D.
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