Final answer:
Innate behavior refers to unlearned responses and actions that are genetically hardwired in an organism, manifesting naturally without prior learning or practice, such as reflexes in humans and complex behaviors like web-spinning in spiders.
Step-by-step explanation:
Innate behavior is natural (unlearned) behavior to a given stimulus. This type of behavior is essentially hardwired into an organism's brain and does not require learning or practice to manifest. Examples of innate behaviors include a spider spinning a web, birds migrating as seasons change, and human infants suckling for nourishment. Such behaviors are controlled heavily by genes and show little to no variation due to environmental influences.
They are instinctual, exhibiting complex patterns that an organism performs naturally upon encountering specific stimuli for the first time, and every time thereafter. One of the simplest forms of innate behavior in humans and animals are reflexes, which are automatic responses to stimuli, such as pulling your hand away from something hot.