Final answer:
Obsessions are the intrusive thoughts that make it hard for Dabnus to focus on his studies due to his constant worry about germs. Additionally, anxiety and OCD can also affect school attendance and sleep. Implementing good study habits can help reduce stress and improve focus.
Step-by-step explanation:
The intrusive thoughts referred to as obsessions.
Anxiety and OCD can affect a student's ability to focus on their studies and may lead to trouble sleeping and stress about going to school.
Good study habits, such as managing workspace and giving oneself plenty of time, can promote metacognition and help reduce stress and distractions.