1.where do most amphibians have to reproduce and why do they reproduce in that particular location?
2.in reproduction, do frogs have internal or external fertilization?
3.what is metamorphosis?
4.besides the use of gills and lungs, how else can amphibians obtain oxygen?
5.what type of symmetry do frogs display?
6.how do we know when it is mating or breeding season for frogs?

 1. water, not exactly sure on that but my best guess is to protect the eggs from being discovered by smell. 2. external. 3. the process of evolving to one or more stages of adolescence to adulthood. 4. absorbed through the skin from the water. 5. bilateral 6. you will hear the male frogs croaking at dusk/ night in an attempt to find/ call a mate. 

B and E

Explanation:

Social behaviour is described as interactions taking place between two or more individuals with in the same species.

The interactions outside the species are not considered part of social behaviour.

Thus, out of all given options, option B and E are correct.

Option A, D and C , are not correct because with in animals itself there are millions of species and thus interaction with in the species is not considered as social behaviour.