What is the significance of the cycle of substances in nature?

Thanks to the food connections between organisms in the ecosystem, there is a continuous circulation of substances, accompanied by energy transformations, that is, the transition of one type of energy to another.

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.