You didn't give the options. However, i'll try.
To me, a stone cannot be ethical because it cannot suffer. Indeed, the capacity for suffering must be satisfied before we talk about interest in a meaningful way. For instance, nothing we could possibly do for a stone could make a difference in its welfare. It don't have interest. Whereas, we, humans have interest. Therefore we can be ethical because we are sentient beings that can be benifited or harmed. It's because we can experience pain as a result.
Hope this helps !
Photon
They can light the wood of the bat on fire. Unless it is metal.
It makes me think of possibly hope, bitter and sad, but then there is a release. I'm just taking a guess here though, I'm not totally sure
I think he can't bear the fact that his wife passed away.
