Answer:
B
Step-by-step explanation:
Look through the answer choices and eliminate the ones that don't make sense:
A. "Love alone is the answer to all problems"; the excerpt mentions nothing about love, so we can say that this is irrelevant and thus, wrong.
B. "Some hard situations must be faced alone"; this is very likely because the excerpt said that "Mowgli went down the hillside alone". In addition, this could be characterized as a "hard situation" because this is the first time Mowgli is going to face his species - humans. We can imagine that it will be hard on Mowgli to realize that these people are his "family".
C. "Beauty fades, but goodness lasts"; again, the excerpt doesn't talk about beauty or goodness. It does mention dawn beginning to break, but it doesn't elaborate on it or make us think that it might be talking about the fleeting beauty of the dawn. Eliminate C.
D. "Solutions to problems are found in nature"; similar to above, the excerpt doesn't discuss how nature can solve all problems. Actually, the main focus isn't on nature but on human society because Mowgli is headed toward the men.
Thus, B is the answer.
Hope this helps!