The correct answer is case study.
A case study is a method of psychological research that involves collecting in-depth information and data about an individual person or animal. Information gathered from case studies can be from a combination of questionnaires, interviews, observations etc. Case studies can be conducted when investigating any psychological phenomena, however, they are most useful when investigating psychological or mental disorders.
Challenging behavior is the correct answer.
Challenging behavior is defined as any behavior that interferes with children's learning, development and successful play. This type of behavior affects not only the kid who is presenting this behavior but the other kids and adults around him/her. Unfortunately, if this behavior is not dealt with, it will put the child at high-risk, school and social failures later on since it limits the kid's ability to learn and grow.
Answer: the separation of powers among different levels
Explanation:
The answer would be, "A", "Egypt".