This question is too vague to be able to answer well. I assume that it is asked about some specific chapter or something. But we don't know what chapter that is.
In this book, Sam encounters many things. Overall, I think that he is encountering nature. He is meeting it and having to live with it.
During this time, he encounters animals like the Baron Weasel and like his falcon, Fearful. He encounters bad weather like the snow storm that we see at the start of the book. He encounters people as well. The most notable of the people he encounters in the earlier parts of the book is Bando, the English professor.
If you want to let me know which part of the book you are supposed to be finding the answer in, feel free.