Reptilesimprovements over amphibians​

Explanation:

Reptiles are considered more advanced than amphibians because they have more advanced lungs. They also have dry scales that enable them to survive on dry conditions, unlike amphibians that needs their skin to be moist, in order to survive on land.

the answer is: they occur when the sun, moon, and earth are aligned. in spite of their name, these tides occur twice a year in the spring and fall.