* Growth and Development: Cacti grow and change over time, just like all living organisms. They sprout from seeds, develop roots, stems, and spines, and eventually produce flowers and fruits.

* Reproduction: Cacti reproduce sexually through flowers and seeds, or asexually through cuttings or pups.

* Metabolism: Cacti carry out metabolic processes like photosynthesis to create energy and respiration to break down food for energy.

* Response to stimuli: Cacti respond to changes in their environment, such as sunlight, water, and temperature. For example, they might grow taller to reach sunlight or close their stomata to conserve water.

So, while cacti may seem different from animals, they clearly share the key characteristics of living organisms.