Answer: "where he was in relation to the map"
Step-by-step explanation:
option one: "Samuel was starting a new school" shows that he was unfamiliar with the area, but it is more of a cause than an indication of him orienting himself
option two: "stood on the grassy lawn of the campus looking at his map"" again is more of a cause showing that he's confused, but doesn't directly explain what it means for Samuel to orient himself
option three: "where he was in relation to the map" elaborates directly on how Samuel is trying to orient himself.
The definition of "orient" is "align or position (something) relative to the points of a compass or other specified positions."
In this phase, Samuel is demonstrating what orient means because he is locating where is (in attempt to align his position) relative to the specified position in the map. This phrase and the definition of "orient" is very similar.
option four: "plotted a route to his first class" happens as an effect of orienting.
I can confirm this is correct on Edmentum.