Question

what could be the reason for scribbling my friend on classroom walls

Answer 1

The main reason may be that he is very creative in approach or he is feeling bored and wants to do some work. or sometimes he may be angry on someone. thus these may be the reasons for scribbling on the wall.

Answer 2

see attachment 
check answer.................

hope it hepls u

f042deac6ed25e327c05fc869c6d19a1.txt