Final answer:
The imagery of a character throwing a bottle upwards intensifies Edgar Allan Poe's gloomy and ominous tone in 'The Cask of Amontillado', suggesting recklessness and foreboding danger.
Step-by-step explanation:
The piece of imagery described in the question helps the author, Edgar Allan Poe, enhance the gloomy and ominous tone of the narrative. When the character in "The Cask of Amontillado" throws the bottle upwards, we are given a strong visual and auditory sense of recklessness and potential for danger, which can make readers feel uneasy. This action may not directly relate to the theme but can foreshadow future events and develops the tone through vivid description. It calls to attention the carelessness and the frenzied state of the character, suggesting a loss of control that aligns with Poe's dark themes of human nature.