2022 · Q32
The boundary layer of the forest at which the energy exchange occurs and some insolation is returned directly to space is
general-sciencebiotech-environment-science
- Aforest floor
- Bforest soil
- Cforest canopy
- Dforest litter
Explanation
The forest canopy — the upper layer of branches and leaves — is the boundary layer of the forest where most energy exchange with the atmosphere occurs: it intercepts incoming solar radiation, drives photosynthesis and transpiration, and reflects/returns a portion of insolation directly back to space (albedo effect). The forest floor, soil and litter are below this active exchange layer and receive only filtered radiation. Hence option C.