Match the following columns regarding physiological adaptations in organisms:

Column-$I$	Column-$II$
$(a)$ Diapause	$(i)$ Inactive stage during summer
$(b)$ Hibernation	$(ii)$ Inactive stage during winter
$(c)$ Dormancy	$(iii)$ Temporary suspension of development
$(d)$ Aestivation	$(iv)$ Reduced metabolic state during unfavorable conditions

(A) The correct matching based on biological definitions is:
$(a)$ Diapause: $(iii)$ Temporary suspension of development (often seen in zooplankton).
$(b)$ Hibernation: $(ii)$ Inactive stage during winter (e.g.,bears).
$(c)$ Dormancy: $(iv)$ Reduced metabolic state during unfavorable conditions (often used for seeds/plants).
$(d)$ Aestivation: $(i)$ Inactive stage during summer (e.g.,snails/fish).
Therefore,the correct sequence is $(a-iii, b-ii, c-iv, d-i)$.