To determine the mood implied by the story's setting in "Big Water" by Andrea Curtis, consider the tone and context of the excerpt. If the setting evokes calmness and tranquility, then "peaceful and relaxed" would be appropriate. If there are unsettling or mysterious elements, "eerie and frightening" would be suitable. Without access to the specific excerpt, it's difficult to decisively choose one. However, if the atmosphere is serene, the first option is likely best; if there are darker undertones, the third option might be more accurate.
Based on your needs, I suggest you reflect on specific descriptions and the overall feeling conveyed in the excerpt before making a choice. If you have specific aspects from the text in mind, please share them for more targeted help!