Predators depend on plants for their lives. only plants can convert the energy of the sun into the energy of chemical bonds. The energy that is generated during photosynthesis is transferred through the food chains.
Plants depend on predators, whose bodies decompose and turn into humus and thereby make the soil fertile, this gives the plant minerals. Predators regulate the number of herbivorous animals.
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.