B. But only so an hour
the word only indicates that "an hour" is considered a short time period for the flower, and so it represents "the youth" of it being a flower before it becomes like the rest
The analogy is meant to show parallels between two sets of words. Fertile is to arable as vague is to clouded. If you understand either pair it can be used to decipher the meaning of the other pair you don't know.
This notebook belongs to Nam
The Mason’s tool is heavy
She prepared her children’s outfit
The boy’s coat is torn
Mr Van and Mr Dong are friends
The pupils desk are always clean
The house’s window are green
The cap’s of the boys are on the shelf
He likes to read John Keats poems
My mother in laws house is in the country
