In addition to benefiting your personal life and society, being a skilled public speaker can also benefit your

Being a skilled public speaker means more than just having the ability to give speeches in front of a bunch of people. By definition, it means you are skilled at speaking in public, in any situation. Being skilled in this way boosts your confidence. It makes you less afraid of the people around you, and it makes you more able to tackle social and professional situations on a daily basis. It becomes easier to make friends and to speak with superiors. You're more likely to succeed in job interviews, auditions, and oratory assessments if you're good with your words and are capable of carrying on a conversation with others. In general, because of these facts, you are generally more successful in life.

The linear perspective changed the quality of art because it gave art a sense of reality. it gave the illusion that the background and surroundings were actually close and/or far and a sense of depth. linear perspective change the quality of art following its birth the renaissance period as they want the art to be more realistic and they believe one way to achieve it is to use the method of linear perspective. it uses the principle of math to realistically portray space and depth in art. 

Art? im sorry i dont study lolololol but i hope you find ur anser!