* They grow and develop: Trees start as tiny seeds and grow into massive structures over time.

* They reproduce: Trees produce seeds or spores to create new trees.

* They require energy: Trees obtain energy through photosynthesis, converting sunlight into food.

* They respond to their environment: Trees can adjust their growth patterns based on factors like sunlight, water, and temperature.

* They have internal processes: Trees have complex internal systems for transporting water, nutrients, and oxygen.

All of these characteristics are hallmarks of living organisms, making trees definitively living things.