Final answer:
In Chapter 7, Pax learns to fight by defending Gray and also learns about the dangers humans pose to the natural world during times of war, exemplifying character growth and thematic elements.
Step-by-step explanation:
The importance of Pax meeting the old fox, Gray, in Chapter 7 of the story can be distilled into two key events. Firstly, this encounter teaches Pax vital survival skills such as how to defend himself, which is shown when he protects Gray from a challenger.
Secondly, Gray imparts crucial wisdom onto Pax about the danger of humans, especially in times of war. These details not only contribute to Pax's character development but also enhance the thematic depth of the story by highlighting the impact of war on the natural world and the bonds formed between animals.