HSK 5 HSK C5/V5
Correct

伸

/ shēn / 
Strokes

Collocation

1
伸手
2
伸腿
3
伸舌头
4
伸懒腰
5
伸长脖子
6
伸出窗外
7
伸开双臂

Definition

伸 is a Verb, which means[to stretch/to extend].