Option b is correct because amphibians to live on land they must adopt to any of the two respiratory types that is cutaneous or pulmonary respiration

Answer:

In order for amphibians to be successful on land, they had to develop cutaneous respiration and lungs.

Explanation:

Amphibians are a group of cold-blooded vertebrates that includes frogs, toads, salamanders, and newts. They are unique in their ability to live both in water and on land. However, in order to be successful on land, they had to develop certain adaptations.

1. Cutaneous Respiration:
Amphibians have thin, moist skin that allows for gas exchange through the process of cutaneous respiration. Cutaneous respiration involves the diffusion of oxygen and carbon dioxide through the skin. This adaptation allows amphibians to obtain oxygen from the air while on land, reducing their dependence on aquatic environments.

2. Lungs:
In addition to cutaneous respiration, amphibians also developed lungs to facilitate respiration on land. Lungs are internal organs that are specialized for the exchange of gases. They provide a larger surface area for oxygen uptake and carbon dioxide release compared to the skin. The development of lungs allowed amphibians to breathe air more efficiently and survive in terrestrial habitats.

3. Shelled Eggs:
Another important adaptation for amphibians' success on land is the evolution of shelled eggs. Shelled eggs provide protection and a suitable environment for the development of embryos outside of water. These eggs contain an amniotic membrane that helps retain moisture and prevents desiccation. This adaptation allows amphibians to reproduce and complete their life cycle in terrestrial habitats.

Conclusion:
In summary, for amphibians to be successful on land, they had to develop cutaneous respiration and lungs to facilitate efficient gas exchange. Additionally, the evolution of shelled eggs allowed for reproduction and development outside of water. These adaptations enabled amphibians to colonize and thrive in terrestrial environments.