Question

Stop Your friend for littering around the desk.what can you do to motivate your for cleanliness

Answer 1

By cleanliness we mean the habit of keeping physically and mentally clean.
A smartly dressed person with clean habits creates an impression on others. It usually reflects a clean character also. In other words, a person’s character can be assessed by the way he dresses.
If he is carelessly dressed, he will most probably be an unruly person. Similarly, if he is in the habit of dressing smartly, he tends to be clean in character also. This is the general rule although there are exceptions to it.
Men with good character are usually pious and god-fearing. They stick to certain morals in their life. Thus, having a god fearing or clean heart is the first step to being godly. In other words, godliness should begin from the heart.
One can have a clean heart only if he cultivates a good character. In other words, a good heart is moulded from a good character.

Answer 2

First of all warn him/her from doing any further litter.
Then I would explain him/her the importance of cleanliness in class.
Still if he/she is doing I will have to complain to teacher(as in schools they are the head) and write a letter to the Principal on requesting to interfere into the matter.