Question

an important guideline to follow when giving care for a victim before ems personnel arrive is to—
do no further harm.
keep the victim warm.
prevent a victim from moving.

Explanation:

When providing care to a victim before EMS arrives, the top - priority is to ensure no further harm occurs. Moving a victim without proper assessment can cause additional injuries. Keeping the victim warm is important but secondary to preventing further harm. Preventing a victim from moving may not be appropriate if it is necessary to perform life - saving maneuvers like CPR.

Answer:

Do no further harm.