Answer:
In her poem, Maya Angelou uses the figure of speech known as a simile to compare the jiggling bellies of elderly people while laughing to the motion of slow tambourines.
Step-by-step explanation:
A simile presents a comparison between two different things to create a vivid image of an idea or situation. In this case, the comparison to tambourines allows the reader to better understand the joyful image of their bellies jiggling due to laughter.