Amajor export from sri lanka used by students around the world

The answer that the major export used by student around the world is graphite. The example of the things that was used in the student is pencil, pencil are made up of a nontoxic mineral called graphite. The communal name is pencil lead is due to a historic suggestion with the stylus finished of lead in ancient Rome times. There is no lead in the pencil. 

answer; severe;

answer; /// the above statement is ( true);