Here's why:
* Silent: The jungle is far from silent. It's filled with sounds of insects, animals, and the rustling of leaves.
* Comforting: The jungle is presented as a hostile and unsettling place, far from comforting.
* Lively: While there's a sense of life and activity, the jungle is more characterized by a chaotic and overwhelming energy.
Raucous captures the cacophony of sounds and the overwhelming, unsettling atmosphere of the jungle in *Heart of Darkness*.