Based on the lesson, which event was a direct result of Einstein's letter?

The arms race to produce nuclear weapons between two world superpowers. ... the establishment of a project in Los Alamos, New Mexico, to develop the first atomic bomb.

Explanation:

The use of nuclear power as an alternative energy source to fossil fuels

world war i began in 1914, after the assassination of archduke franz ferdinand, and lasted until 1918. during the conflict, germany, austria-hungary, bulgaria and the ottoman empire (the central powers) fought against great britain, france, russia, italy, romania, japan and the united states (the allied powers). to new military technologies and the horrors of trench warfare, world war i saw unprecedented levels of carnage and destruction. by the time the war was over and the allied powers claimed victory, more than 16 million people—soldiers and civilians alike—were dead.

explanation:

i believe it to be a democracy