How has the poet compared the scene inside the car with the activities going on outside?

Outside the car, the young trees seemed to have come alive, merry children were spilling out of their homes while inside the car, sat the poet's mother, wan and pale like a late winter's moon. The world outside seemed to entice her with unexplored possibilities, it was fresh and new, in the spring of life while her mother symbolised the duty and responsibility that she owed to the old world she came from. It shows the dichotomy that the poet found herself in, whether to leave her mother behind for the sake of something new or give up unexplored possibilities and choose the old familiar.