The natural world is a finely-tuned balance of biotic (living) and abiotic (nonliving) components that shape our environments. Various biotic factors directly affect processes like population growth, ...

Abiotic factors are non-living chemical and physical elements in the environment, which affect individual organisms as well as ecosystems. Examples are UV, IR and visible light, radiation ...

After this no plants were found [1 mark]. They also recorded the depth of the soil (an abiotic factor).