Correct

背部

/ bèibù / 
Strokes

Definition

back (of a human or other vertebrate, or of an object)

Example

As a Noun

back of the body; dorsum

1
Bèibù
背部
shòushāng
受伤

be injured/wounded in the back; suffer a back injury

2
Niǔshāng
扭伤
bèibù
背部

strain one's back