Question

at dawn, in winter we see dewdrops on the leaves of the tree

Answer 1

we see dew drops on leaves of trees in winter because the moisture that was present in the air after getting cooled down at dawn becomes small droplets which we call dew

Answer 2

In winter we have colder weather, sometimes snow and frost, the trees have no leaves and the amount of time it is light during the day is at its shortest. In spring the weather usually turns warmer, trees begin to grow their leaves, plants start to flower and young animals such as chicks and lambs are born.