An internal conflict is a battle that takes place inside yourself. It makes the person who is having to deal with this battle choose between a variety of options or even just two options in particular. Basically like choosing to either roleplay as a forced-to-be-villain with a kind heart or a hero with a dark side. Or, if that is a bad example, to cheat on a test but pass or fail the class entirely.
The fox symbolizes a sly, wise character, visibly comparing to the typical thought of foxes. The fox flatters the crow in order to distract her from the cheese, resulting in the fox winning the piece of cheese. The fox, in conclusion, is presented as clever, wise and witty.
"After they rested a few days,the aliens revived sufficiently to explore"