The annual net primary productivity of the whole biosphere is approximately...

In plant succession,when the climax community is reached,the net productivity

Which of the following is the least productive ecosystem?

Arrange the following ecosystems in increasing order of mean $NPP$ (Tonnes / ha / year):
$A.$ Tropical deciduous forest
$B.$ Temperate coniferous forest
$C.$ Tropical rain forest
$D.$ Temperate deciduous forest

Match the Column-$I$ with Column-$II$ and choose the correct option.

Column-$I$	Column-$II$
$(a)$ $\text{NPP}$ of ocean	$(i)$ $115$ billion tons
$(b)$ Annual $\text{NPP}$ of the whole biosphere	$(ii)$ $170$ billion tons
$(c)$ $\text{NPP}$ of terrestrial ecosystem	$(iii)$ $55$ billion tons
$(d)$ Secondary productivity	$(iv)$ Heterotrophs

The rate of formation of new organic matter by consumers is defined as: