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Final answer:To draw the skeletal line structure of an organic compound, you should represent carbon atoms as ends of lines or bends, omit hydrogen atoms bonded to carbons, and denote all other atoms with their elemental symbols. Acetylene and 3-methyl-1-hexyne are depicted with simple lines and bends, which denote carbon atoms, and triple bonds when necessary.Explanation:Translating expanded Lewis structures into skeletal line structures allows us to represent organic compounds more simply. To draw the skeletal structure of Compound A based on its given expanded Lewis structure, follow these steps:Each end or bend in a line represents a carbon atom.Hydrogen atoms bonded to carbons are not shown.Atoms other than hydrogen and carbon are shown using their elemental symbols.Double bonds are represented by two parallel lines.For acetylene, the skeletal line structure would be a triple line between two points, representing the carbon atoms. For 3-methyl-1-hexyne, sketch a line with five bends, indicating the carbon chain, with a triple bond between the first two carbon atoms from the end, and a line indicating a methyl group branching off of the third carbon atom. This is a simplified visualization of larger organic molecules and is commonly used in organic chemistry....