Какие причины способствовали заключению польско-литовской унии?

People say that there is no bad weather. At any time of year the weather makes us happy with her gifts. I would like to tell you about the fall, because there's nothing better, than the autumn weather. There is something sad in the fall, but at the same time romantic. The weather becomes cooler and you need to dress warmer. But that does not stop you from walking outdoors to breath the fresh air. Forests and parks have already dressed in their autumn attire. Leaves get all hues of yellow and red, and some are still green. So, perhaps, there is no such colorful time of the year, as autumn. On flowerbeds autumn chrysanthemums, asters, lubellias appear. They are like the bright flashes on the yellowing flowerbeds. Even the autumn air gets its own special flavor and becomes more transparent. Weather turns wet and rainy. But autumn gives us her last gifts of this year - mushrooms and berries, fruits and vegetables.