Basically she means that a documentary photograph isn’t always 100% true something else could’ve happened in the time the photo was taken and it made it look a different way . and he’s photographs can convey a larger meaning than what is present because you could take a picture of something and not know the full meaning behind it .
I would (for the first) work on realism in you art. know your features and be able to know how to reproduce them. It would be best to work on realistic portraits of other people, perhaps stock photos off the internet. For fantasy landscapes, I think that things that are trippy are good for fantasy landscapes. weird color schemes and similar things of that nature. hope i could help!
Short/simple answer: because it was forbidden to picture or sculpt anything figurative (i.e. representing a being or object). Figurative art could be wrongly interpreted as a depiction of Allah and worshipped instead of Him, and that would be considered idolatry.
