​The following graph shows the change in proportion of biomass in foliage (leaves), branch and stemwood (bole) for a tree species as a function of DBH (diameter at 1.5 m above ground).​

​Which one of the following options correctly matches the curves (A, B, and C) with stemwood, foliage and branch, respectively?​

Correct option is B

Explanation-

Curve A (steep increase, high proportion, stabilizes at high DBH):
Likely Stemwood
As tree diameter increases, stemwood becomes the major component of biomass. Its proportion increases sharply and dominates at larger DBH.

Curve B (low and fairly constant proportion):
 Likely Foliage (leaves)
Foliage contributes a relatively small and stable proportion of total biomass regardless of DBH. Trees maintain similar leaf biomass across sizes.

Curve C (high at low DBH, then decreases):
 Likely Branch
Branch biomass is higher in younger/smaller trees, but as stemwood dominates in large trees, the proportional contribution of branches decreases.

Correct Matching:
A – Stemwood
C – Branch
B – Foliage

This corresponds to Option B