On what grounds can you distinguish between different types of variability?

For example, variability in the form of a decrease in body temperature or a slowdown in heart rate. All of the above refers to the variability of the organism.

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.