Answer:
biosphere and lithosphere interaction
Explanation:
With biosphere is a term that describes the region of the earth which encompasses lives and the ecology, and lithosphere, on the other hand, lithosphere is a term that describes the earth region containing the crust and outmost layer of the earth.
Hence, in this case, when the animals dies and decomposes into smaller organic matter, that involves the biosphere, which deals with lives of organisms and the ecology, however, as those bodies decomposes, and then transforms into earth bodies, by getting absorbed into the soils, forming earth crust sediments, this involves lithosphere.
Therefore, If an animal dies and decomposes into sediment, the system spheres that are interacting are BIOSPHERE and LITHOSPHERE
