The cycle of substances in nature in which the crow participates.

Crows, like any living organisms, participate in the cycle of substances. This is the water cycle in nature, as birds drink water, excrete it and it is restored by natural features such as evaporation. But living organisms themselves do not help and do not interfere with the water cycle in nature. They are just participants in the cycle. Also, ravens consume organic and inorganic substances. They are restored thanks to various bacteria and fungi that break down organic waste and thus ensure their existence.

One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.