Final answer:
An instinct is a tendency that is biologically innate.
Step-by-step explanation:
Innate behaviors are tendencies that are biologically innate. They are behaviors that occur naturally in all members of a species whenever they are exposed to a certain stimulus. These behaviors do not have to be learned or practiced, and they are controlled by genes with little or no environmental influence. For example, a dog drooling when exposed to food is an innate behavior.
In contrast, learned behaviors are behaviors that occur only after experience or practice. These behaviors are flexible and can be changed if conditions change. For example, a person learning a new route to school is a learned behavior.
In contrast, learned behaviors are those that are acquired through interaction with the environment and through practice, such as the route you take from home to school. Therefore, the correct answer is C. biologically innate.