I wanna say it’s b but if not I’m so sorry !
Answer:
- One because they are amphibians
- two because amphibian means two lives
- third because they live on land and sea
- Fourth because they live longer (I think)
Explanation:
Frogs begin their lives in the water as eggs and then tadpoles and when they are fully developed they live on land.
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The lungs have no skeletal muscles of their own. The work of breathing is done by the diaphragm, the muscles between the ribs (intercostal muscles), the muscles in the neck, and the abdominal muscles.
The respiratory system works directly with the circulatory system to provide oxygen to the body. Oxygen taken in from the respiratory system moves into blood vessels that then circulate oxygen-rich blood to tissues and cells.
