What does down here mean?

[Dony]

English Language Tests, Intermediate level

ESL/EFL Test #310 "English Slang Idioms (31)", question 7

"I want you kids down here bright-eyed and bushy-......... at 8 o'clock," their dad said.

(a) coated
(b) footed
(c) built
(d) tailed

English Language Tests, Intermediate level

ESL/EFL Test #310 "English Slang Idioms (31)", answer 7

"I want you kids down here bright-eyed and bushy-tailed at 8 o'clock," their dad said.

Correct answer: (d) tailed
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what's the meaning of down here?

[Beeesneees]

In this question, 'down here' relates to a downstairs room where the father is currently speaking. Shortly the children will go upstairs and the father is explaining he wants them back where they are now at 8:00.
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Cheers m' dears!

[Tofu]

be bright-eyed and bushy-tailed (humorous)
to be full of energy and eager to do things
- She was bright-eyed and bushy-tailed the next morning, despite having been up half the night.

[Tofu]

I wonder why the dad wants their kids to be energetic at 8.

[Beeesneees]

Not so much 'energetic' as ready to go, Tofu.
The saying is often used to indicate readiness as a sort of humorous exaggeration.
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Cheers m' dears!

[Tofu]

Thank you, B.