Explain why modern wars are often less deadly and destructive than ww1 was.

Geneva convention/Laws of war

Explanation:

WW1 Didn't really have any rules when it came to war thus there were cruel weapons and tactics used causing many deaths on both sides of the war but in modern times there are many things that change the way you have to fight, such as ROE(Rules of Engagement) and certain ammo types must be used because the collateral damage they have is lessened compared to other rounds. Also technology has changed a lot since then, body armor, armored vehicles, and advancement in weapon technology making engagement distances far greater.

explanation:

there are two statements that are incorrect.

1. the marshall plan was a lend lease program. it was an economic plan that europe redevelop itself after wwii.

2. einstein didn't really do anything to further the allied cause in building the bomb. he merely sent a letter to fdr telling him (in 1939) that if the united states entered the war, perhaps it would be wise to build the bomb before germany did. i would say this answer is incorrect, but when america entered the war 2 years later, fdr thought it might be a good idea to take einstein's advice.

the 4th choice is definitely so wrong that is likely the single answer of this question

americans experinced rations on food and be gangrene their own food and feed their families going to go over jobs that were orginally only for men.