Which of the following is an artificial method of vegetative propagation?

$(a)$ Identify the organisms $A$ and $B$ and the mode of asexual reproduction exhibited by them.
$(b)$ How will an organism be benefitted if it reproduces through spores?
$(c)$ Mention the two asexual methods by which Hydra can reproduce. Explain briefly any one such method.

$(a)$ Give the functions of the following :
$(i)$ Pollen Tube
$(ii)$ Ovary
$(b)$ List any two changes observed in the body of a female during puberty.

Why are budding,fragmentation,and regeneration all considered as asexual types of reproduction? With neat diagrams,explain the process of regeneration in Planaria.

Explain the term "Regeneration" as used in relation to reproduction of organisms. Describe briefly how regeneration is carried out in multicellular organisms like $Hydra$.

Give an advantage of vegetative propagation.