Respuesta :
Terry's lack of ability to sit still shows that he is suffering from Attention deficit hyperactivity disorder, ADHD.
ADHD is a common mental disorder.
Attention deficit hyperactivity disorder, ADHD
- ADHD is a mental illness in which a person cannot concentrate for longer time and cant sit still for longer time.
- If you have ADHD, your brain is starving for stimulation, reward, and something new to do.
Thus, terry's lack of sitting still is due to Attention deficit hyperactivity disorder, ADHD.
Learn more about ADHD, here:
https://brainly.com/question/6334838