D. Catalyst
A catalyst is a reason for an event to occur.
Between the flagstones along the path, tiny flowers were growing is correct.
Question 13 is when she called, I didn't recognize her voice.
#14 is sincerely yours,
#15 is the first one
Answer:
c) His house frame was ready for its boards by mid-April. He had gotten the boards from a small, run-down building he purchased for a good price.
Explanation:
The third paragraph of Walden's "Economy" outlines Thoreau's two-year narrative. He spent his days in the little hut throughout these years.