Correct Answer - B
Stratification is the vertical distribution of different species occupying of vertical levels in a biotic community. It is formation of vertical layers where vegetation is dense, i.e. 5-7 strata (layer) in tropical rainforests with emergent tall trees, canopy tress, shrub layer below trees layer bottom layer of herbs and grass ground level.
Zonation is the horizontal categorisation of biomass into zones based on their distribution or arrangment in habital as determined by environmental factors, e.g. altitude, latitude, temperature , biotic factors, etc.
