Which ecosystem shows maximum genetic diversity

Given below are four statements $(a-d)$ each with one or two blanks. Select the options which is correctly fill up the blanks into two statements.

$(a)$ Ecological succession is a…$(i)$… and fairly predictable changes in the ….$(ii)$… of a given area

$(b)$ Ecological succession, entire sequence of communities that successively change in given area are called …$(i)$….

$(c)$ Primary succession occurs on…$(i)$…

$(d)$ Secondary succession is …$(i)$… than primary succession

Carbon is available to crop plants in the form of

Burning of fossil fuels affects

Plants like Rhizophora and Avecennia grow on the sea shores under saline condition. For this they have special roots for respiration which are called