Question

select the text from the paragraph that best helps you understand that conundrum means difficulty. there may be more than one correct choice. for these discoveries to be seen, dr. sparks and his colleagues first had to address a significant technical conundrum presented by the unique properties of biofluorescence. the light that biofluorescent creatures emit is not visible to the human eye. as a result, biofluorescence is impossible to photograph using traditional methods and equipment. the scientists ultimately decided to shine a high - energy blue light on the fish they were attempting to photograph. this light mimicked the light of the ocean and triggered the fishs biofluorescence. the researchers also outfitted their camera lens with a specially designed filter that removed the unwanted blue light from the image, allowing the fluorescent light to be more clearly seen.

Explanation:

The text mentions "a significant technical conundrum" and then details the difficulties like non - visibility of biofluorescent light to the human eye and inability to photograph with traditional methods. These details around the "conundrum" show it means difficulty.

Answer:

"a significant technical conundrum", "The light that biofluorescent creatures emit is not visible to the human eye. As a result, biofluorescence is impossible to photograph using traditional methods and equipment."