The prejudice is a part of a society's common sense which can be changed by conversations about different topics and an educational system made from open minded people who can teach without their particular opinions so each student can form their own opinions. School is a knowledge space, there are many opportunities to discuss, construct and change ideas, especially when young people, who are easier to convince are the major haunters. The solution is educating people to create their own concepts and stop teaching things like it's a truth, showing all the possibilities and encouraging questions instead of expecting them to agree with everything.

Explicação:

eu escolhi o preconceito como tema, dei a solução de ensinar as pessoas a terem as próprias opiniões ao invés de seguir o senso comum.