The longer straight line in the following cartoon should be colored violet as it represents photons traveling from a more distant galaxy through an accelerating Universe. 
Definitions:
Alt Text
Short for "alternative text," a description of an image or non-textual element in digital content, used to provide context for visually impaired users.
Screen Reader
Assistive technology software that reads the text displayed on a computer screen aloud to users, often used by people who are blind or have visual impairments.
Animate Button
A feature in software that allows the user to apply animation effects to buttons, making them visually dynamic.
Connector
A tool or feature in diagramming and vector graphic software that creates lines or arrows to show relationships between objects.
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