Comparison words: Same, Similar, alike, as well as...
Contrast words : Different, on the other hand, opposed to...
Answer:
A. Nikolai's dual character
Explanation:
Forking rivers or paths are commonly used to express a character's opposing features in literature. In this case, it represents Nikolai's two sides - stern and caring. The river merges into one at the end - implying that his two sides can coexist.