Do civilizations around the world often use the same art techniques

Not at all! Chinese drawings are often different then ones you will see in rome and so on :) Drawings are diverse depending on the culture they are from.

All arts are amazing it's only that each country has different culture drawings, so no the don't have the same.

People's profiles are important because they show you who they are unless they're fake.

Iwould say overhead, b/c front would shine in their face, and might mess up the picture, especially if taken by a so either front or overhead, but i'm leaning towards overhead