idiom: to have one's feed on the ground?

[Nenad11]

English Language Tests, Intermediate level

ESL/EFL Test #348 "English Slang Idioms (69)", question 6

"I like your boyfriend. He seems to have his ......... on the ground and is a smart guy," her dad told her.

(a) feet
(b) boat
(c) rump
(d) thoughts

English Language Tests, Intermediate level

ESL/EFL Test #348 "English Slang Idioms (69)", answer 6

"I like your boyfriend. He seems to have his feet on the ground and is a smart guy," her dad told her.

Correct answer: (a) feet

Your answer was: correct
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Does to have one's feet on the ground mean to be on one's own,independable,to be able to do everything on one's own?

[Mister Micawber]

You seem to be copying these idiom definitions out of a book or off a website, Nenad. Just trust them; there's no need to confirm with us if the meaning fits the sentence. (I am tired of just answering 'Yes' to all your posts.)
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Native English teacher at Mister Micawber's