Lighting is the answer, not 100% sure but I think it's the right answer.
<span>Light and shadow can <u>model</u> an object, giving it a three-dimensional appearance</span>
It should be noted that essay writing is to students in order to test their writing and reading skills.
<h3>How to write an essay</h3>
Based on the information given, the way to write the essay will be given. Firstly, it's important to decide on your topic. In this case, the topic is to explain why the technology are beneficial to the users of the gautrain.
Research should be done on the topic and create an essay outline. Set your argument in the introduction and develop it with evidence.
Finally, check the content, grammar, formatting, spelling, of your essay.
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sculptures: you create them by hand, they are physical
photographs: you capture them in electronics, they can't be touched
both: both pieces of art
