What breathes with gills as larvae and with lungs as adults.\nOptions:\n- (A) Salmon.\n- (B) Frogs.\n- (C) parasites\n- (D) Whales.\n- (E) Mice.\n- (F) a fish\n- (G) air\n- (H) tortoises
Step-by-step reasoning:
(B)
Most amphibians breathe with gills as larvae and with lungs as adults.

All frogs are amphibians.

Most frogs breathe with gills as larvae and with lungs as adults.

.

Thus, the answer is (B)