Q: How many chambers does an amphibian heart have?


Read this paragraph and choose the correct option from the provided answers:

Amphibians have a relatively complex circulatory system with a three-chambered heart. Their nervous system is also rather complex, allowing them to interact with each other and their environment. Amphibians have sense organs to smell and taste chemicals. Other sense organs include eyes and ears. Of all amphibians, frogs generally have the best vision and hearing. Frogs also have a larynx , or voice box, to make sounds.

 Choices:

- four

- two

- one

- three


A:
three