Choose the word most nearly antonymous (opposite in meaning) to the capitalized word:
TERRESTRIAL
Terrestrial means belonging to the earth or the land, so its opposite is a word meaning belonging to the sky or the heavens. Celestial means relating to the heavens, which is the direct antonym.
The word that means the opposite of earthly is celestial, so the answer is celestial.
If the price of a commodity increases by 25%, by what percentage should the consumption be reduced to keep the expenditure the same?