'adverbial modifier of time' vs. 'object'

[Lost_Soul]

English Idioms and Expressions, Advanced Level

ESL/EFL Test #45 "Clothing Idioms (1)", question 2

My teacher told me to buckle down this term.

(a) wear a seatbelt
(b) put a lot of effort into
(c) sit down

English Idioms and Expressions, Advanced Level

ESL/EFL Test #45 "Clothing Idioms (1)", answer 2

My teacher told me to put a lot of effort into this term.

Correct answer: (b) put a lot of effort into
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Hi,
1.My teacher told me to buckle down when? this term (this term is an adverbial modifier of time)
1.My teacher told me to put a lot of effort into into what? this term (this term is an object)

Do I understand this correctly?

Thanks !

[Mister Micawber]

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Yes.
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Native English teacher at Mister Micawber's