Why was thorin captured by the wood elves in chapter 8?

Thorin Oakenshield was captured by the Wood Elves in Chapter 8 of "The Hobbit" because he and his companions were trying to avoid detection while traveling through the Mirkwood forest. However, they were discovered by the elves after being ensnared in their webs and losing their way. Thorin's pride and refusal to trust the elves led to his capture when he attempted to confront the situation rather than seek a peaceful resolution. This ultimately resulted in him being imprisoned in the Elvenking's dungeons.