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
