The problem of evil is well-discussed in philosophy (and somewhat less well discussed on Christianity.SE). Examples include the apparent contradiction within an omni-benevolent, omniscient God allowing children without brains to be born or animals to be trapped in forest fires and burn alive.
The most common theodicy is probably the free will one. But that doesn't address scenarios where no humans are involved - for example animals being killed in disasters without anyone noticing and (hopefully) learning a lesson from the event. Animals trapped in a natural disaster area (let's pick earthquakes or meteors, to not get into "climate change is a punishment" arguments) are killed violently or cruelly (think burning alive in a forest fire). If a human did that to an animal today, or even failed to intervene when it was within their power and they could safely do so, they'd be shunned (in most cultures). Yet God has been doing just that for millions of years, despite His power to slightly alter natural laws.
What are the most rationally convincing answers in the Bible to this human-independent problem of evil?
Another common theodicy, "God works in mysterious ways" wouldn't qualify because that can justify absolutely anything, making "God" indistinguishable from pure chance.