Concept:Biotic factors are the living components of an ecosystem that affect organisms and productivity.
Explanation:In an agricultural ecosystem, biotic factors include all living organisms such as plants, animals, microorganisms, and pests.
These organisms interact with crops and livestock in ways that influence growth, reproduction, and yield.
Examples include beneficial insects like pollinators, harmful pests, soil bacteria, and competing weeds.
By contrast, climate and weather are abiotic factors, while the physical environment and nutrient availability are also non-living.
Therefore, the correct description of biotic factors is the one that refers to living organisms.
Answer:B. Factors related to the living organisms