Select the Venn diagram that best represents the relationship between the following classes.
Whales, Fish, Mammals
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) →
In a Venn diagram two circles overlap when some members belong to both classes, one circle lies inside another when every member of the first belongs to the second, and circles stay apart when the classes have no common member.
Whales breathe with lungs and feed their young on milk; every whale is a mammal, so the whale circle lies inside the mammal circle
A fish is not a mammal (and a whale is not a fish), so the fish circle stays apart from both
One circle inside a larger circle, and a third circle apart, as in Option (1)
