Lethargic means lazy, depressed, whereas vital means full of life. As you can see, these two words are antonyms, meaning that they have completely different meanings. So, in order to finish the analogy, we need to find the antonym of the word trite. Trite means cliche, overused, so its antonym would be original, unique, or something in that vein.
So, the correct answer could be original.
Grazing contentedly in the pasture is the dream of every cow.
Grazing contentedly in the pasture is to chew grass happily in the grass meadow.
The part where it says she plans to spend six hours every weekend studying in the library
