Name the type of asexual reproduction in:
$(a)$ Planaria
$(b)$ Rhizopus
$(c)$ Spirogyra
$(d)$ Hydra

(A) Planaria reproduces by Regeneration,where the organism can regrow lost body parts or develop into a new individual from a body fragment.
$(b)$ Rhizopus reproduces by Spore formation,where specialized structures called sporangia produce numerous spores that develop into new individuals.
$(c)$ Spirogyra reproduces by Fragmentation,where the filament simply breaks into smaller pieces upon maturation,and each piece grows into a new filament.
$(d)$ Hydra reproduces by Budding,where a small outgrowth or bud develops on the parent body,which eventually detaches to form a new individual.