The correct option is D Pathogens
Abiotic factors are the physico-chemical components that characterise the habitat of an organism. In simple words, abiotic factors include the non-living components of an ecosystem. The most important abiotic factors of an ecosystem are temperature, soil, water and light. The living or biotic components interact with these factors, and thus, maintain a state of balance in the ecosystem. Pathogens, being living organisms, are part of the biotic components of an ecosystem.