Question

why are the young trees described as sprinting?

Answer 1

the young trees are seem to be as in opposite direction when seen through window of the moving car

Answer 2

Hey !!

While Kamala Das was driving with her mother to the Cochin Airport she looks outside. With the speed of the car the young trees seem to be racing fast past them. Here she brings in the contrast between the world outside which is full of life and on the other her mother who is slowly fading away.

Good luck !!