1. Organization: Living organisms are highly organized structures composed of cells, tissues, organs, and systems. Stuff animals and plastic plants, on the other hand, are inanimate objects with no internal organization.
2. Growth and development: Living organisms grow and develop over time. They start as single cells and then undergo a series of changes that lead to the formation of complex structures. Stuff animals and plastic plants, however, do not grow or develop. They remain unchanged throughout their existence.
3. Reproduction: Living organisms reproduce, creating new individuals that are similar to themselves. Stuff animals and plastic plants cannot reproduce. They are manufactured objects that are not capable of giving rise to new organisms.
4. Metabolism: Living organisms carry out metabolic processes, such as respiration, nutrition, and excretion. These processes allow them to convert energy from their environment into usable forms and to eliminate waste products. Stuff animals and plastic plants do not have metabolic processes. They do not require energy or produce waste.
5. Response to stimuli: Living organisms are able to respond to stimuli in their environment. For example, plants respond to light by growing towards it, and animals respond to touch by moving away. Stuff animals and plastic plants do not respond to stimuli. They are completely unresponsive to their surroundings.
6. Homeostasis: Living organisms maintain a state of equilibrium, or homeostasis, within their internal environment. This involves regulating factors such as temperature, pH, and water balance. Stuff animals and plastic plants do not have the ability to maintain homeostasis. Their internal conditions are determined by the external environment.
In summary, stuff animals and plastic plants are not alive because they lack the fundamental characteristics of living organisms. They are inanimate objects that do not exhibit the processes and properties associated with life.