You can find them anywhere mostly in your backyard mostly in the dark so snakes will not find them, and in a pond, swamp and other water place's.
A frogs most common habitat is living in water
Most male frogs puff their chins for mating calls. Most frogs also inflate their bodies a bit for defense.
Yes, frogs most definently have brains.
Most frogs eat insects.
most frogs and toads can't but some can its because of there poison. most poisonous frogs are bright colored so watch out for those.
the most common amphibians are tadpoles. :)
* SOUTH AMERICA! * And sometimes Asia.
Most substances foreign to frogs are harmful or lethal.
Yes
Frogs are predatory; most feed on insects.
Some frogs have inner ears but most have middle ears.
No; like most (if not all) adult frogs, they are carnivorous.