Here's why:
* Ectotherm: This means the animal relies on external sources of heat to regulate its body temperature. Reptiles, amphibians, and fish are all ectothermic.
* Dry Skin: This is a key characteristic that distinguishes reptiles from amphibians. Amphibians generally have moist, permeable skin (necessary for cutaneous respiration). Reptile skin is dry, covered in scales or scutes, and relatively impermeable to water, which is an adaptation for terrestrial life.
Therefore, based on those two criteria, the answer is a reptile.