Such figures may be straightforward, like the red rose in Burns's poem. Or they may be as complicated as the figure in the concluding lines of William Butler Yeats's poem The Second Coming
I liked how they talked about how figurative language can be straight forward or be more complicated because it lets you use it in different ways. If your writing a light hearted poem or even a funny poem you might use figurative language in a more simple obvious way. But when your writing about a more serious topic you might make it more complicated.