-As we have learnt:
Fragmentation:
- The parent organism can be divided into many pieces called fragments.
- Each piece will develop into a complete individual.
- A great example of fragmentation can be seen in spirogyra.
- Spirogyra is a green alga that floats freely on freshwater ponds. Under a microscope, it can be seen as a rectangular cell with a nucleus in the vacuole located in the centre.
- The rectangular cells are joined together in long strands called a filament.
- When a filament is divided into many pieces, each piece will grow into individual filaments.
-Hence, the correct answer is option b.

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