Poppy is a symbol of Remembrance Day because they are the only flowers that grew on the battlefields after World War I. They are very delicate flowers, too, and live for a short time.
Some people have also pointed out that fields of bright red poppies look like fields of blood. There are many poems about Remembrance Day many of them mention poppies. One of the most famous of these poems is In Flanders Fields.
At 11am, there is a two minutes silence. A lone soldier plays a piece of music called The Last Post on the bugle to introduce the two-minute silence. Soldiers playing another piece, The Rouse, to single the end of it. Musicians also play traditional wartime songs such as The While Cliffs of Dover and It's a Long Way to Tipperary.