Probably in any rain forest. They like moisture. I would say probably the Amazon in South America.
the rainforest
Frogs are all over the world in various places. They do not come from one place.
yes in fact there are the most venomous amphibians in the world
yes the move from place to place
yes they can as it says in the paragraph about frogs some frogs DO live in Antarctica.frogs may be found anywhere in the world (excluding Antarctica), although most frogs are found in the tropics. Most species are found in tropical regions. You can find frogs in or near places that have water. Some frogs never go into the water they live mainly on land. Some frogs even live in trees. These frogs have tiny, sticky pads on their fingers and toes to help them cling to the trees they climb
A frogs most common habitat is living in water
The most humid place in the world is the cloud tree forest.
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. :)