Life cycle: Like all amphibians, frogs spend their lives near water because they must return to the water to lay their _____________________. Frog eggs are laid in the _____________________, and they hatch into _____________________. Tadpoles breathe with gills and swim using a long _____________________. As they mature into adult _____________________, they lose their tail, and they develop _____________________ for breathing air. In harsh climates, frogs bury themselves in sand and _____________________, and _____________________ (sleep very deeply) through the cold _____________________.