The appearance of the seed gave the gymnosperms great advantages, since it freed the sexual process from the need for water for fertilization (the climate at the end of the Mesozoic era became drier, but remained warm).
Reptiles acquired properties that allowed them to finally break with the aquatic environment. Internal fertilization and the accumulation of yolk in the egg made reproduction possible on land.
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.