In this analogy, the first pair is Weed : Garden. To weed means to remove unwanted plants from a patch of land so that it stays healthy and tidy. So weed is the action, and garden is the object on which that action is carried out. We need a second pair that follows the same action to object pattern, this time with the action edit.
The correct option is News, because just as a garden is the thing that gets weeded, news is the thing that gets edited.
Let's summarize:
So the word that completes the analogy Weed : Garden :: Edit : ? is News.
If the price of a commodity increases by 25%, by what percentage should the consumption be reduced to keep the expenditure the same?