Q: How many eyelid membranes do frogs have?


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

In order to live on land and in water, frogs have three eyelid membranes: one is see-through to protect the eyes underwater, and the two other ones let them see on land. Frogs also have a tympanum , which acts like a simple ear. They are found on each side of the head. In some species, the tympanum is covered by skin.

 Choices:

- two

- four

- one

- three


A:
three