Final answer:
Some species of starfish can reproduce through regeneration by breaking off an arm or splitting in half, which involves the process of mitosis.
Step-by-step explanation:
The type of cell division that occurs in the process of starfish reproducing by breaking off an arm or splitting in half is regeneration through mitosis. Mitosis is a type of cell division that results in the formation of two genetically identical daughter cells. In the case of starfish, when an arm is broken off or the starfish splits in half, the cells in that broken off part or half undergo mitosis to regenerate and produce a whole new organism.
Learn more about Reproduction in starfish