The correct answer is B) Moving away from each other, as the inner walls of a tube that flare outward. The term "divergent" means to move away from a common point or to gradually separate. This best describes the situation where the inner walls of a tube or other structure flare outward, causing the edges to move further apart from each other. The other options are incorrect because: A) describes maintaining equal distance, which is the opposite of divergence; C) describes the walls moving closer together, which is the opposite of divergence; and D) describes a conversion of energy types, which is not related to the definition of "divergent".