Topography - the configuration of a surface and the relations among its man-made and natural features
Source Sentence : "Depending on numerous factors, such as topography and psychology, the riflemen carried anywhere from 12 to 20 magazines, usually in cloth bandoliers, adding on another 8.4 pounds at minimum, 14 pounds at maximum" page 5
Context Clue : example and your logic I read ahead to see what could give me a clue which was the word psychology and since psychology is the study of the human mind so leaving that topography had to be a study of something.
1 sentence explanation : In war, for soldiers it's important to have topography or map in order to know where they are going.

Profound - showing intellectual penetration or emotional depth
Source Sentence : "The guy's dead, he kept saying, which seemed profound- the guy's dead. I mean really." page 12
Context Clue : Example, the way they used profound is that the guy saying the guy's dead actually put it in there head that no one could ignore
1 sentence explanation : one of the books that I think it's the most profound in my life is the Twilight series

volition - the act of making a choice
Source Sentence : "... one step and then the next and then another, but no volition, no will, because it was automatic, it was anatomy, and the war was ntirely a matter of posture and carriange, the hump was everything, a kind of intertia, a kind of emptiness, a dullness of desire and intellect and conscience and hope and human sensibility." page 14
Context Clue : example, The rest of the sentence gives the hint of the word's definiton the part "no will, because it was automatic. . ."
1 sentence explanation : When I read and listen to the same time it's no volition to me when I take notes on what I read about.