I believe you are asking about the "triangle" we were tought a simple triangle. Cells at the bottom because there are the most of them, tissues next, organ next, and organ system at the top. So I believe the answer you are looking for is Organ System.
Answer:
Explanation:
Trauma and stressor-related disorders are a group of emotional and behavioral problems that may result from childhood traumatic and stressful experiences. These traumatic and stressful experiences can include exposure to physical or emotional violence or pain, including abuse, neglect or family conflict.
The bodys functions are conducted by organs. Each organ is a recongnizable structure that performs specific functions. An organ is made of several types of tissueand therefore several types of cells. So the correct answer is: B/ Tissues.
REM Sleep
This is due to the fact that there is low muscle tone going on throughout your body.