Answer: It helped them use the land they've known, either by hiding or launching clever attacks, against the British.
Explaination: The Americans knew the land they lived in. They knew were things were, which hiding spots were the best, and where the British might come. Now, this factor may not have been the most effective during the Revolutionary War, but it certainly was a big help. The British just came and attacked, but the Americans knew when to pop out of the bushes or when to be at a specific area.
In these ways, geography was useful to the Americans.
After the surrender of the Confederate Army, Lincoln is extremely conciliatory to the South. The reason why he does this is because he wants the Confederate States to rejoin the United States in a way that will help the country move forward peacefully.
With this in mind, Lincoln introduces the 10% plan. Only 10% of citizens within a particular state had to vote in agreement to join the United States again. The only condition of rejoining the US that the citizens had to agree to was the promise to never secede from the US again. This plan made it easy for the Southern states to rejoin.
Answer: I would say the answer is D) the study of how people use resources
