Final answer:
Frogs belong to the class Amphibia in the biological classification system. They are specifically classified under the order Anura, which is also known as Salientia or 'jumpers'. Frogs have specialized adaptations for movement and can live both in water and on land.
Step-by-step explanation:
In biological classification, frogs belong to the class Amphibia along with other amphibians like salamanders and caecilians. Amphibians are vertebrate tetrapods, meaning they have a backbone and four limbs.
Frogs are specifically classified under the order Anura, also known as Salientia or 'jumpers'. They have specialized adaptations for movement, such as long hind legs that enable jumping and webbed finger-like parts for swimming.
Frogs have roughly 5,000 species distributed across all continents except Antarctica. They are known for their unique characteristics, including their ability to live both in water and on land, and their three-chambered heart.