what does it mean insulates? aggravates?

[Givi]

Business English Lesson, Advanced Level

ESL/EFL Test #153 "Cost Accounting", question 8

Cost accounting ......... managers toward company goals.

(a) aggravates
(b) gravitates
(c) insulates
(d) motivates

Business English Lesson, Advanced Level

ESL/EFL Test #153 "Cost Accounting", answer 8

Cost accounting motivates managers toward company goals.

Correct answer: (d) motivates
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what does it mean insulates? aggravates?

Givi

[Mister Micawber]

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Native English teacher at Mister Micawber's