This question requires identifying the correct one-word substitute for the given phrase: "The belief that arranging the home or office in a particular way will bring good or bad luck."
Let's analyze the options:
From the explanations above, Geomancy is the most suitable one-word substitute for the given phrase, as it directly pertains to arranging spaces in a specific way to bring luck.
Therefore, the correct answer is Geomancy.
If the price of a commodity increases by 25%, by what percentage should the consumption be reduced to keep the expenditure the same?