What is aperture and how does it affect a photograph

aperture is the opening inside the camera lens. The mechanical part is a diaphragm made of several blades which can be adjusted to change the size of the opening. it can effect a photograph because it controls how much light you let into the camera sensor. if you let in too much the picture will be to bright and if you let in to little the picture will be to dark

Explanation:

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artists need to create a realistic interpretation so that people in general can relate to the artwork. for a common people, an artist's impression gets increased only if he can create something which would look realistic. an abstract is difficult for a common people to understand whereas if a person can draw a girl with simple pencil sketch and if that looks like a real figure then the latter will be praised more than the former.