Learning is the process of acquiring knowledge or skills through practice or experience, leading to long-lasting behavioral changes. This acquisition occurs through interaction with the environment and requires practice or experience. For instance, mastering a skill such as surfing requires considerable practice and experience, highlighting the essential role of repeated interactions with the environment in learning.

In contrast to learned behaviors, unlearned behaviors such as crying, sexual attraction, and forming social bonds are innate and are referred to as instincts. These instincts are hardwired into an organism's biology and may evolve with maturation, comprising whole-body movements and higher brain functions. Activities like parental caregiving or the fight-or-flight response exemplify instincts that involve complex brain functions and extensive physiological changes.

Reflexes, another category of unlearned behaviors, are automatic motor or neural responses to specific stimuli. Organisms are born with reflexes, which do not require learning or experience to develop. Examples include the knee-jerk reaction, where tapping the patellar tendon induces a swift leg movement and pupil contraction in response to bright light. Reflexes are typically simpler than instincts, involving specific body parts and primitive central nervous system centers such as the spinal cord or medulla.

Both reflexes and instincts play crucial roles in enabling organisms to adapt to their environments from birth. Human infants, for example, instinctively know how to suckle, an essential reflex for feeding. Similarly, sea turtle hatchlings instinctively move toward the light reflected by the ocean's surface upon emerging from their nests, a vital behavior for their survival.

The distinction between learned and unlearned behaviors underscores the complexity of adaptive mechanisms in organisms. While learned behaviors are acquired through interaction and experience, unlearned behaviors like reflexes and instincts are innate and critical for immediate survival. These innate behaviors provide a foundational advantage, allowing organisms to respond effectively to their environments from birth. Understanding the interplay between these types of behaviors is essential for comprehending the broader mechanisms of adaptation and survival in the natural world.