water
No. Amphibians reproduce sexually, as all vertebrates do.
Frog was the amphibians live on land and go back to the water to reproduce.
Alligators are reptiles. Because they don't require water to reproduce, they are not amphibians.
Most amphibians are seasonal, although depending on where they are in the world, it is year round.
Amphibians
Yes, through a system called amplexus.
Amphibians
As with most amphibians the fertilization is external. The female releases the eggs and the male fertilizes them. Amphibians, even toads, need water to reproduce.
Amphibians
Yes. Many, if not most amphibians crawl or walk around on land with their little appendages or legs, and need water only to reproduce in.
No they are not mammals. Amphibians and Reptiles are other classes of animals at the same level as the mammals. Mammals have hair, are warm blooded and give birth to live young. Amphibians and reptiles reproduce using eggs.
Amphibious - animals that live on land and water are amphibians (although technically amphibians need to return to water to reproduce/lay eggs)