• Hydra is an aquatic animal that reproduces both sexually and asexually.  When plenty of food is available Hydra undergoes an asexual mode of reproduction by producing a small outgrowth called 'bud' on its body. This type of asexual reproduction is called budding. The bud stays attached to parent body and keeps growing. Once this bud matures, it breaks off from parent body and grows individually as a new individual.
• Amoeba and Paramecium undergo fission, where parent cell splits into two daughter cells.
  
• Plasmodium exhibits multiple fission, where many daughter cells are produced.
  

So, correct answer is option A.

Monocarpic plants flower only once in its lifetime. They die after flowering. Annuals like marigold, wheat, paddy, biennials like radish, perennials like Bambusa tulda which flowers every 50-100 years, fruits and dies.