The most accurate conclusion about how the writings of the Lost Generation were influenced by the great loss of life experienced during the First World War would be:
They wrote literature in order to process their experiences of being involved in the war.
While some members of the Lost Generation may have served as war journalists or medical officers, the overarching theme of their writing is often related to the broader trauma, disillusionment, and impact of the war on society and individuals, including those who experienced it directly.