A different grammar and syntax

Environmental changes can cause organisms stress, altering chemical balances and interactivity; further chemical and physical changes result, possibly producing other, new, changes. None of this requires a brain - many stimulus and response patterns persist without neurons, let alone a nerve center. We might even posit that every living cell has learned from its very lengthy history of experience (going back, one might well posit, to the very first cell).
A rainforest, with too much adaptation and diversity, becomes too fragile, while a desert can provide room to breathe. Difficulties can make for
strength, ease for weakness.