The statement below is followed by four options. Each option is related to the item in the statement, but only one is always true. Select the option that always holds and makes the statement true.
"A bird always has ______."
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → Feathers
The answer must hold for every bird, without exception. An option that is present in most cases but can be missing in even one case is not always true.
Option (1) Teeth — birds have beaks and no teeth.
Option (2) Feathers — a body covering of feathers is the mark of a bird; every bird, even one that cannot fly, has feathers, so this is always true.
Option (3) Ability to fly — the ostrich, the emu and the penguin cannot fly.
Option (4) A long tail — many birds have short tails; the kiwi has no tail at all.