Biological phenomena are those changes that we observe in living organisms. For example, in the spring leaves bloom on the trees, fresh grass appears. Later you can see how flowers and various fruits are formed on plants. Withering processes are also a biological phenomenon. Therefore, we also attribute yellowed leaves and leaf fall to such phenomena. In the animal kingdom, everyone can observe the arrival of birds in the spring, or, conversely, how they fly away to warm regions.
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.