Which sentence uses vivid language to establish a peaceful tone?
a. silently moving his head from left to right and right to left, the owl scanned the barn floor for mice.
b. william's best friend, alan, arrived just in time to see the horse trainer beginning to work with the feisty filly.
c. aimee watched the newborn kittens nestle into perfectly round balls against their mother's fur and begin to purr.
d. pinecones plopped on the forest floor as squirrels scurried from tree to tree, gathering nuts before winter arrived.