The term "divergent" is best described as which of the following?

Correct Answer: Option B — Moving away from each other, as the inner walls of a tube that flare outward.

Divergent geometry refers to a passage where the cross-sectional area increases in the direction of flow. In gas turbine diffusers, this shape is critical for slowing down high-velocity air exiting the compressor, effectively converting kinetic energy into static pressure to optimize combustion efficiency and prevent compressor surge.