Flatworms are a diverse group of animals belonging to the phylum Platyhelminthes. They are characterized by a flattened, ribbon-like body shape and lack of body cavity. They exhibit various properties, out of which regeneration is well-exhibited by some flatworms.

Regeneration in Flatworms:
Flatworms have high regenerative capabilities and can regenerate their entire body from small fragments. This property is facilitated by the presence of totipotent cells in their body, which are capable of differentiating into any type of cell. The regeneration process involves the migration and proliferation of these cells to restore the lost body parts.

Examples of Regenerative Flatworms:
Some flatworms that exhibit remarkable regenerative capabilities are Planarians, a type of free-living flatworm. They can regenerate their entire body from small fragments, including their brain and nervous system. Another example is the freshwater Hydra, which can regenerate its tentacles and body from small fragments.

Significance of Regeneration:
The regenerative capabilities of flatworms have significant implications in the field of regenerative medicine. Scientists are studying the mechanisms of regeneration in flatworms to understand how it can be applied to human tissues and organs. Flatworms also serve as a model organism for studying the development and regeneration of complex body structures.

Conclusion:
In conclusion, some flatworms exhibit high regenerative capabilities, which are facilitated by the presence of totipotent cells in their body. This property has significant implications in the field of regenerative medicine and makes flatworms a useful model organism for studying development and regeneration.

Some platyheminthes, such as Planaria, have a tremendous power of regeneration. So, this option is correct.