Question

complete the text with the detail that most logically develops the narrative. before the invention of digital cameras, scientists had to rely on visual artists to capture fleeting natural phenomena such as eclipses. in 1918, astronomers commissioned painter howard russell butler to depict the total solar eclipse that would be visible over baker, oregon. one of butlers biggest challenges was having less than two minutes to capture subtle changes in light. to accomplish this, he worked in ten - to - twenty - second shifts and began by sketching the corona—the outermost layer of the suns atmosphere. back at his studio, butler relied on his sketches, notes, and memory to paint what he had seen. after receiving acclaim for his accurate and visually stunning work, he created images of three more eclipses in 1923, 1925, and 1932. he then wrote down the colors he observed and drew an outline of any visible gases surrounding the eclipse. butler had once studied physics and used his deep understanding of the principles of light throughout his work. butlers attention to detail served him well as he painted other majestic events, such as the northern lights. butlers time limit was particularly short; sometimes eclipses can last as long as seven and a half minutes.

Explanation:

The text is about Butler's process of depicting solar - eclipses. The sentence about writing down colors and drawing outlines of visible gases follows the logical flow of his on - site observation and note - taking process before returning to the studio to paint. Other options either introduce new, unconnected information (like his physics study) or are off - topic (comparing eclipse time limits).

Answer:

He then wrote down the colors he observed and drew an outline of any visible gases surrounding the eclipse.