True. Always question things you assume and things you THINK are right.
5+x
x represents the number, and "more than" indicates that it's addition.
The purpose is to help the reader/student/? understand the subject at hand and make it easy to get evidence for your claims/ideas.
It is an external conflict.
Conflicts are the situations that advance the plot of a story. Fundamental to entertain the reader, because through them the characters express themselves. The external conflict is one that occurs between two or more characters or a character and their environment.
In the fragment, the conflict is between the main character and his environment, which is very cold and uncomfortable. The character should learn how to make the fire to face the adverse situation.
