Help please

Read the excerpt from a creative nonfiction assignment.
The dog trotted behind me as I hiked through the woods.
A dog is a loyal companion, I thought to myself, even
when the person it's loyal to is a total stranger. Up
ahead, I saw my old friend, Lake Tasika. I looked at the
dog. He looked at me, tail waving. I looked at the lake. It
looked back at me. "Jump in," it said in cool laps against
the bank, though I'd never jumped in before. "Why not?" I
said aloud to the dog. The dog barked his affirmation,
though I was no expert on the meaning behind dog
barks. I dropped my pack and ran.
How does the author's use of parallelism contribute to
the mood of the excerpt?
O It creates an eager mood by repeating actions taken
and observed by the narrator.
O It creates an annoyed mood by showing how the
narrator views the dog as a nuisance.
O It creates a serene mood by emphasizing the solace
and joy the lake provides to the narrator.
O It creates a lonely mood by imitating an echo
sometimes found near a remote mountain lake.