Final answer:
Frogs are classified under the phylum Chordata, class Amphibia, and order Anura. This order also includes toads, sharing many common features and adaptations with frogs.
Step-by-step explanation:
Frogs belong to the phylum Chordata and fall under the class Amphibia. Within this class, frogs are further categorized into the order Anura, which is sometimes also referred to as Salientia. The characteristics that define the Anurans include long hind limbs for jumping, moist and permeable skin for cutaneous respiration, and a life cycle that includes an aquatic larval stage followed by metamorphosis into an adult stage.
Anura is the most diverse group of amphibians, including both frogs and toads. While typically, frogs have smooth, moist skin and are more likely to live in or near water, toads tend to have drier, bumpy skin and are more adapted for drier environments. Despite these differences, the taxonomy beneath the order level is the same for both frogs and toads. All amphibians are ectothermic vertebrates which signify they cannot regulate their body temperature without external help.
The fascinating aspects of frog adaptation, such as the ability to avoid predators through camouflage or the release of poisonous chemicals from their skin, make them unique among amphibians.