Each kingdom of wildlife has its own role in the biosphere.

• Plants create organic matter from inorganic compounds, converting solar energy into chemical energy available to all living things;
• animals – participation in the biotic circulation of substances and energy;
• organisms – destroyers of organic matter – bacteria and fungi close the cycle of substances, bringing it to a mineral state and preparing food for plants – creators of organic matter.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.