1) Those species in which the death of individuals in nature is high are distinguished by high fertility. 2) In the nightingale, the excessive production of eggs seems to cover their possible death (nesting type of chicks, many enemies, long flights to winter quarters, etc.). 3) In species with well-developed care for the offspring, the death of chicks is small (more mature chicks, the absence of natural enemies, a sedentary lifestyle).
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.