What are the aromorphoses that allowed the ancient amphibians to master the land?

1) The appearance of pulmonary respiration (allows you to absorb atmospheric oxygen),
2) limbs (for movement on land),
3) a three-chambered heart and two circles of blood circulation (enhances metabolism).

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.