Final answer:
Option c, 'Hills covered with lush, emerald-green grass rolled to the horizon,' effectively uses imagery to heighten the joyful mood by providing a vivid and detailed description that appeals to the readers' senses and imagination.
Step-by-step explanation:
The student asked how imagery could be used in revising sentence 14 to heighten a joyful mood. Imagery is a literary device used to create a vivid and detailed description that appeals to the senses.
To heighten the joyful mood in sentence 14, detailed and vivid language that conveys the beauty and serenity of the scene will be most effective.
Choosing option c, 'Hills covered with lush, emerald-green grass rolled to the horizon,' uses imagery effectively to create a picture in the reader's mind and evoke a sense of joy and awe.
The word 'lush' conveys a sense of rich, healthy foliage, while 'emerald-green' gives a precise color that is often associated with vibrancy and life. The verb 'rolled' adds a dynamic quality to the hills, making the scene seem alive and inviting.