 
 <translate> Trees have woody stems covered with bark. During the stripping, the protective layer of inner bark is removed. Trees have woody stems covered with a protective layer.
So, the final answer is (D). <hau> Bishiyoyi suna da bishiyoyi masu katako da aka rufe da barkono. A lokacin cirewa, ana cire layin kariya na ciki na barkono. Bishiyoyi suna da tsire-tsire masu katako da aka rufe da wani abu mai kariya. Saboda haka, amsar karshe ita ce (D). 