Read the following extract and answer the questions that follow :The Laburnum top is silent, quite stillIn the afternoon yellow September sunlight,A few leaves yellowing, all its seeds fallen.Till the goldfinch comes, with a twitching chirrupA suddenness, a startlement, at a branch end.Then sleek as a lizard, and alert, and abrupt,She enters the thickness, and a machine starts upOf chitterings, and a tremor of wings, and trillingsThe whole tree trembles and thrills.It is the engine of her family.She stokes it full, then flirts out to a branch-endShowing her barred face identity mask.Then with eerie delicate whistle-chirrup whisperingsShe launches away, towards the infiniteAnd the laburnum subsides to empty.[Without goldfinch (a small singing bird with yellow feathers on its wings) the laburnum tree remains standing lifeless. But just as the goldfinch comes on it, it comes alive. With the departure of the bird, it again becomes calm and lifeless]1. What has happened to the seeds of the laburnum (tree)?2. How does the goldfinch come?3. With whom has a goldfinch been compared in sleekness?4. Why has the tree been called engine of her family?5. What happens to the laburnum when the goldfinch flies away?