The answer to this question is option D forest.
Answer: osteon consists of a central canal called the osteonic (haversian) canal, which is surrounded by concentric rings (lamellae) of matrix. Between the rings of matrix, the bone cells (osteocytes) are located in spaces called lacunae.
Answer: Option C) organ
An organ is made up of similar tissues performing the same function e.g skin.
The skin is an organ (sense organ) composed of several kinds of tissues that all help to protect the body from invaders