What reproductive method do some salamanders exhibit besides laying eggs in water?

Some salamanders exhibit a reproductive method known as viviparity, which involves giving live birth rather than laying eggs in water. This adaptation allows certain species to provide a more secure and supportive environment for their developing young, particularly in habitats where egg-laying may be risky due to predation or environmental conditions. By retaining the eggs within their bodies until the offspring are ready to hatch, these salamanders can ensure a higher survival rate for their young, as they emerge fully developed. This form of reproduction is particularly observed in species that live in more terrestrial environments, where access to water for egg-laying may be limited.

In contrast, other options involve methods that are not typical or relevant to salamander reproduction. For instance, hydration of eggs in saltwater and laying eggs in acidic environments do not accurately represent the common reproductive strategies of salamanders. Flying over water to lay eggs is also not valid, as salamanders are terrestrial creatures that do not possess the capability to fly. Understanding the unique reproductive strategies of salamanders highlights their adaptability to different environments.