Most amphibians breathe with gills as larvae and with lungs as adults.
An adult frog has lungs and teeth.
Adult frogs have teeth and breathe with gills as larvae.
Adult frogs have what and breathe with gills as larvae?

(a) embryos
(b) a fish
(c) ovaries
(d) grow
(e) teeth
(f) survive
(g) NaCl
(h) oxygen