Preservation is defined as an animal’s ability to perceive through stimulus to its self in a situation with another animal or object in the environment which cause responses seeking to preserve or nurture itself or both entities in the said situation. Debilitation will be defined as the ability of certain life forms to perceive because of stimulus to its self in a situation with another form of life or object in the environment which can have said life responding to cause harm or injury towards itself and or the other entity.
For examples, an amoeba or a paramecium have marginal capacities to disrupt or encourage upon its self the stimulus it receives from its environment. Though a jellyfish will sting an interpreted threat or take flight, seeking homeostasis with either of these responses. A tadpole will use locomotion to pain stimulus, not possessing a physiological debilitative capacity to respond with. Ants and bees will sting or bite an interpreted threat.
Picture two nervous system capacity is an extension within certain life forms that compliment and magnify the inherent cellular preservative qualities for survival within an environment. Whether the added systems of sensory integration and interpretation, for physical response to the environment are large or minuscule, simple, specialized, or complex in function or purpose is again all dependent on a genetic code which creates the animals nervous system capacity.
To summarize at this point two distinct class of life forms: those that have nervous system capacity for interpretations and responses of and towards the environment, and those that do not.
Within this picture two class of life, interpretations of environmental stimulus are perceived within two parameters: as either threatening or benevolent to the system.
With this introduction for a rudimentary nervous system of picture two class of life, the objectives or goals for further development of more intricate processes of integration of sensory stimuli within nervous systems will be introduced.