The letters are A, C, E, and G. you can remember this by the acronym ‘All Cars Eat Gas’
Ansel adams is your answer
An open volume is a space that is enclosed by materials that are not entirely solid.
An open volume is produced by artists when they enclose a space using materials that aren't entirely solid. Volume is the quantity of three-dimensional space that is encased or contained by a closed surface, such as the space that a material or shape involves or contains.
Space with dimensions of length, width, and depth is referred to as three-dimensional. Solidity, volume, and mass are all aspects of the three-dimensional world. We relate it to things that occupy space, such a sphere, cube, or pyramid, as well as things like trees, chairs, and people.
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