Why is it important for the president to select heads of the executive departments

It is important for the president to select heads of the executive departments rather than Congress, because The President must rely on these department heads for advice and assistance as he fulfills his duties as chief executive. Such cooperation is positive for the state and definitely effective.

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

a. the astrolabe could determine the correct latitudinal location of the ship