I’m pretty sure it’s true so A
Contour Lines.
A perceived line that marks the edge of a figure as it curves back into space. Contour lines are created by the edges of things. Contour lines are lines that surround and define the edges of a subject, giving it shape and volume
The answer C Different Trains
A sound film is a motion picture with synchronized sound, or sound technologically coupled to image, as opposed to a silent film. ... At first, the sound films which included synchronized dialogue, known as "talking pictures", or "talkies", were exclusively shorts.
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