Final answer:
Juxtaposing means placing two elements side by side to compare or contrast them, often emphasizing their differences. In the given context, natural light is juxtaposed with darkness to highlight contrasting atmospheres.
Step-by-step explanation:
The term juxtaposing refers to the act of placing two elements close together or side by side for the purpose of comparing or contrasting them. In the context provided, 'natural light in Gas' is likely being juxtaposed with a different type of lighting or time of day to highlight differences. For instance, the bright 'flooding light of dawn' in 'Early Sunday Morning' is compared to the empty and dark windows in 'Nighthawks', which suggests the absence of natural light and the presence of an 'indecent hour of night', demonstrating a world that is at rest versus one that is about to wake. This comparison serves to emphasize the contrasting atmospheres of the two scenes being described.