$(a)$ Identify the asexual method of reproduction in each of the following organisms:
$(i)$ Rose
$(ii)$ Yeast
$(iii)$ Planaria
$(b)$ What is fragmentation? Name a multicellular organism which reproduces by this method.

(N/A) $(i)$ Rose $\rightarrow$ Cutting (Vegetative propagation)
$(ii)$ Yeast $\rightarrow$ Budding
$(iii)$ Planaria $\rightarrow$ Regeneration
$(b)$ Fragmentation is a type of asexual reproduction in which the body of the parent organism breaks into distinct pieces or fragments,and each fragment develops into a new individual. Spirogyra is a multicellular organism that reproduces by this method.