The illustration enhances the passage by showing the origin, history, and strength of HALS. Thus, option A is correct.
What is illustration?
In print and online printed publications such as billboards, brochures, journals, novels, educational materials, documentaries, games consoles, and films, illustrations are decorations, interpretations, or visual explanations of a text, concept, or process. Typically, an artist will produce artwork.
This passage shows the mission of the Historic American Landscapes Survey also named (HALS). It was there to show the historic landscapes in the United States through the drawing and its measured and interpretive sense.
It also shows massive color and black-and-white images for the Library of Congress's HABS/HAER/HALS collection. Therefore, option A is the correct option.
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