Amphibians are the first true tetrapods, or vertebrates with four limbs.
Ancathostega is one of the earliest tetrapods found, and by far the most complete.
Ancathostegs have four limbs.
What do ancathostega have four of?
Options:
[A] Eggs
[B] feet
[C] Wings
[D] alveoli
[E] Lungs
[F] ovaries
[G] rings
[H] Limbs