Select the Venn diagram that best represents the relationship between the following classes.

Tortoise, Mammal, Amphibian

THE LOGIC;

Tortoise,     Mammal,    Amphibian

Tortoise is a reptile.

There is a difference between tortoise and turtles.

Tortoise dwell on land, while turtles live in the water.

An animal of the type that gives birth to live babies, not eggs, and feeds its young on milk from its own body are called Mammal.

Amphibian are small vertebrates that need water or a moist environment to survive.

The species in this group include frogs, toads, salamanders and newts. 

Thus, diagram (4) is correct.