The brick becomes a brick because that's how water, earth, and fire material interacts. The specific chemistry of it is not something hte game feels in 3e to go over. But I am pretty sure it's not because soemthing in the aformentioned birck or its kilm exists doing that action that specific thing with intent. To me that's not really animist, it's actually something more akin to monotheism wiht an animist paintjob I guess.
I definitely need to do more reading on the subject, but what little I know of Ainu spiritual beliefs is...
not entirely antithetical to that idea?
In Ainu cosmology, our reality's natural form is a lifeless, meaningless expanse of dust. Spirits make journeys into our reality and inhabit the dust, causing it to take on new shapes and develop meanings. Collectively, these spirit-inhabited shapes are the world as we know it, with things like trees and fish and boulders. (I'm unclear on where humans fit into this schema.)
However, the spirits do not intend to reside in our realm eternally, and will eventually seek to leave. (Speculating, but this might be part of their explanation of why death, erosion, and other destructive phenomena exist - as means for the spirits to discard their physical housing and return home). Part of Ainu religious practice was trying to maintain this cycle of visitation and departure, performing rituals to "send" the spirits back home when their vessels had grown tiresome for them (which naturally involves destroying said vessel). If these rituals were not performed, they believed, then the spirits might become disinclined to keep visiting our realm, resulting in the gradual collapse of everything back into lifeless dust.
(I can't help but see an odd symmetry between the Ainu cosmology and Wajin/Japanese concepts of objects and animals becoming youkai if they last long enough; to the Ainu, that would presumably be a consequence of the spirit within the object growing frustrated and/or delirious and mutating their vessel in an attempt to escape.)
Admittedly, the Ainu spirit-concept is one where most physics and biology occur "because the spirits want it that way", by and large, but in a way where the spirits themselves aren't really interested in causing things to happen outside of the established order we're accustomed to, and are willing to let their vessels be destroyed because they were never planning to inhabit them perpetually to begin with.
As a consequence of it being a sincere effort to understand and explain RL phenomena, treating it as real
could potentially lead to taking a physics textbook and appending "...because such is the will of the spirits" to every scientific law.
More importantly, though, this was all happening within a larger culture with its own specific ideas; for example, traditional Ainu art was intensely aniconic, because depicting any living thing could result in a spirit trying to inhabit said depiction and then getting upset when it found itself stuck inside a shirt or a snuffbox instead of a trout/bear/etc. They would change the specific words they used to refer to various fish and game animal species to fit the season - I remember an example where... salmon, I think, would be rechristened during their spawning season, because it's important to be extra-polite to spirits when they're preparing to leave, and their usual word for 'salmon' sounded a lot like their word for another kind of fish which they felt salmon would find unflattering to be compared to.
Ugh, this started out as me seeing a parallel, but now that I can't find my big book of Ainu history/culture/folklore/etc to refresh myself, I feel like I'm giving a subpar presentation of Japan's First Nations.