In the word ergonomics, "ergo" means:

The number of electrons in the outermost orbit of the atom determines __________

Fill in the blank(s) with correct word

Twelve-year-old Mike does not feel accepted by his peers at school. He frequently acts like a "class clown" to get his classmates' attention and to make them laugh. Mike's behavior is an example of _______ a. competition. b. compensation

c. autonomy. d. a derogatory self-concept.