Choose the most suitable one-word substitution for the following.
An animal that lives both on land and in water.
Show answer & explanation
Correct answer: A
Explanation
Amphibian: This is the correct answer. The word comes from the Greek amphibios, meaning "living a double life." These animals (like frogs and toads) typically start their lives in water and move to land as adults.
Reptile: While some reptiles (like crocodiles or turtles) spend a lot of time in water, the term refers to a specific class of cold-blooded vertebrates with scaly skin, most of which live primarily on land.
Mammal: This refers to warm-blooded vertebrates that nourish their young with milk. While some are aquatic (like whales) or semi-aquatic (like otters), the term doesn't define them by their ability to live in both environments.
Insect: These are small arthropods with six legs and usually wings. Most live on land, though some have aquatic larval stages.