Question

this is a photograph of a coyote.
complete the sentence.
this coyote’s bones are made mostly of
rock
living tissue
dead tissue

Explanation:

动物的骨骼主要由活组织构成，骨骼内部有骨细胞、血管等活的结构，具备生长、修复的能力，并非岩石或死亡组织。

Answer:

living tissue