Correct

蜕皮

/ tuìpí / 
Strokes

Definition

skin cast off during molting/exuvium/to pupate/to molt/to slough/to cast off an old skin or shell

Example

As a Verb

cast off/shed a skin; slough off; exuviate

1
Shé
蛇
dìngqī
定期
tuìpí
蜕皮
  
。

The snake sheds its skin regularly.