Here's why:

* They exhibit all the characteristics of life:

* Organization: They are made up of cells and have complex body systems.

* Metabolism: They take in energy and use it for growth and repair.

* Growth and development: They grow from larvae to adults.

* Reproduction: They produce offspring.

* Response to stimuli: They react to their environment, like avoiding danger or finding food.

* Adaptation: They have evolved over time to survive in their environment.

Let me know if you have any other questions!