The correct option is A upright
The food producer forms the base of the pyramid and the top carnivore forms the tip. Other consumer trophic levels are in between.
Pyramid of biomass is usually determined by collecting all organisms occupying each trophic level separately and measuring their dry weight.
Biomass pyramid for a banyan tree would be upright because the biomass or dry weight of banyan tree will be the largest when compared to all the other organisms like insects and birds. The number pyramids of tree ecosystem can be inverted or spindle shaped.