Answer:
Option B, Organs
Explanation:
Cell is the smallest unit of life. A group of cells forms the tissue and a group of tissue forms an organ. A group of organs froms an organ system and a group of organ system produces an organism.
A tissue is composed of group of similar cells that usually perform a common function. An organ may be composed of common or different type of tissues to carry out a common function for the entire body.
Thus, option B is correct
