What biological factors affect the life of organisms in nature? Why is the anthropogenic factor

What biological factors affect the life of organisms in nature? Why is the anthropogenic factor often considered a threat to nature?

The factors influencing the life of organisms are usually divided into three groups: biotic, abiotic and anthropogenic. Biotic factors include those associated with the influence of living organisms on each other: for example, an increase in the number of foxes in a certain area will lead to a decrease in the number of hares. Abiotic factors are manifestations of inanimate nature, such as climate, relief, chemical composition of water and soil, and so on. The anthropogenic factor implies human impact on nature. Often such impacts harm nature, for example, when a person cuts forests for his needs, this leads to the disappearance of the animals that lived there.