Which process plays an important role in the biogeochemical cycles of carbon, nitrogen, and phosphorus? photosynthesis transpiration decomposition respiration

The correct answer would be decomposition.

Decomposition is a natural process by which complex organic compounds are broken down into simpler organic matter.

It plays an important role in the cycling of all the nutrients (such as nitrogen, carbon, phosphorus et cetera) or matters throughout the biosphere.

It helps in returning the nutrients to the environment (soil, water, or air) from dead plants and animals.  

For example, decomposition helps in returning the carbon contents to the soil in the form of humus which is formed by degradation or decomposition of dead organisms.

emerald ash borer

the emerald ash borer is a green buprestid or jewel beetle native to north-eastern asia that feeds on ash species. females lay eggs in bark crevices on ash trees, and larvae feed underneath the bark of ash trees to emerge as adults in one to two years. hope this !