
The various labels we apply to the infinitely rich aspects of Reality are meaningful to us, their creators. But the labels are invented by humans for use by humans in human contexts. "Life" is a particularly mercurial label, difficult to pin down. The meaning of "life" changes over time and varies from brain to brain.
Some people believe the planet Earth is alive and name her Gaia. She satisfies a number of the criteria for life established by mainstream biologists. For example, she practises homeostasis, the maintenance of a dynamic equilibrium that ensures ongoing biological existence. She self-regulates her "metabolism" through the complex interplay of multiple systems and processes including but by no means limited to those associated with climate, ocean chemistry and plate tectonics, for example. In fact the plants and animals and other lifeforms she supports are themselves part of her physiology.