Match the columns:
Column-$I$ Column-$II$ $(a)$ Earthworm $(i)$ Birth-rate $(b)$ Succession $(ii)$ Pioneer species $(c)$ Population rise $(iii)$ Pollination $(d)$ Ecological services $(iv)$ Saprotrophs
| Column-$I$ | Column-$II$ |
|---|---|
| $(a)$ Earthworm | $(i)$ Birth-rate |
| $(b)$ Succession | $(ii)$ Pioneer species |
| $(c)$ Population rise | $(iii)$ Pollination |
| $(d)$ Ecological services | $(iv)$ Saprotrophs |
(A-IV, B-II, C-I, D-III) The correct matches are as follows:
$(a)$ Earthworm is a saprotroph,which helps in the breakdown of detritus $(a-iv)$.
$(b)$ Succession involves pioneer species that colonize a barren area $(b-ii)$.
$(c)$ Population rise is directly influenced by the birth-rate $(c-i)$.
$(d)$ Ecological services include processes like pollination provided by ecosystems $(d-iii)$.
Therefore,the correct sequence is $(a-iv, b-ii, c-i, d-iii)$.
$(a)$ Earthworm is a saprotroph,which helps in the breakdown of detritus $(a-iv)$.
$(b)$ Succession involves pioneer species that colonize a barren area $(b-ii)$.
$(c)$ Population rise is directly influenced by the birth-rate $(c-i)$.
$(d)$ Ecological services include processes like pollination provided by ecosystems $(d-iii)$.
Therefore,the correct sequence is $(a-iv, b-ii, c-i, d-iii)$.
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