What are the reasons for the failures in the examination

What are the reasons for the failures in the examination.
1.Reading room or place is not in a proper way.
2.Lack of Examination Plan.
3.Procrastination (delay)
4.Lack of Supervision
5.Lack of conducive environment in the house or School.
6.Focusing on Non Important things and issues.
7.Lack of proper Reading plan or division of time.
8.Lack of concentration
9.Lack of warmth and care in the school and in the house as well.
10.Examination Tension.
11.Subject Tension.
12.Unaware of the Tome Management
13.Lack of strong will to get Good marks.
14.Lack of competitive environment in the school or in the school.
15. reading habits.
16.Lack of Writing practice.
17.Home sickness to Hostel students.
18.Lack of Examination Techniques.
19.Lack of Proper examination preparation.
20.Lack of legible hand Writing.
These are some of the Reasons for the failures.