I'd suggest it's a subjective call. There are definitions that suit situations but no absolute definiton. We could view everything in the universe as evolving, changing... we don't say adapting because it suggests a thinking change, but everything is changing none the less, thinking or non thinking. We draw a loose line where we want (between what's alive and not) for practicality that's all. It's when we draw absolute or definite lines that we end up struggling with the issue. "From a distance there's such harmony" as the song goes, so the recipe is don't look too close or if you have to, know how to step back.
"The mind has chasms, cliffs of fall, sheer steep no man fathomed" from a poem by a priest 100 or more years ago. "they hold them cheap nay who hung there".