The platypus has a bill like a duck does on its face?

[Talibova]

English Grammar Tests, Elementary Level

ESL/EFL Test #166 "The Platypus: Vocabulary Practice", question 2

The platypus has a ......... like a duck does on its face.

(a) hoof
(b) wing
(c) bill
(d) quack

English Grammar Tests, Elementary Level

ESL/EFL Test #166 "The Platypus: Vocabulary Practice", answer 2

The platypus has a bill like a duck does on its face.

Correct answer: (c) bill
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I don`t understand the question at all. could you please explain?

[Mister Micawber]

The platypus has a bill like a duck does on its face.

Which words do you not understand? There are no idioms in that sentence.
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Native English teacher at Mister Micawber's