Pretty straight forward that one
Poppies have long been used as a symbol of sleep, peace, and death: Sleep because the opium extracted from them is a sedative, and death because of the common blood-red color of the red poppy in particular.
However, only certain types of poppy produce the right opiate the poppy used for remembrance is NOT of that type, the official story in this case does seem the most likely.
In the spring of 1915, shortly after losing a friend in Ypres, a Canadian doctor, Lieutenant Colonel John McCrae was inspired by the sight of poppies growing in battle-scarred fields to write a now famous poem called 'In Flanders Fields'. After the First World War, the poppy was adopted as a symbol of Remembrance.https://www.britishlegion.org.uk/remembrance/how-we…/the-story-of-the-poppy/