Question

regeneration is not possible in all type of animals

Answer 1

because it is asexual reproduction which take place only one parent cell like star fish

Answer 2

regeneration is the process of renewal, restoration, and growth that makes genomes, cells, organisms, and ecosystems resilient to natural fluctuations or events that cause disturbance or damage.

it is considered as reproduction due it has the ability to make a whole organism with the apart of the organism example star fish can form a new organism by one of the cutted piece of it .

--:Regeneration is not possible for all types of animals because this is possible only for animals with simple cell structure. Organisms with complex cell structures have different cells for different dedicated functions, as in human beings. The tissue structures are also different in complex cell structures.