Question

a psychologist asks people to envision a circle. next he asks them to draw the circle they envisioned. when comparing the pictures, almost all circles look identical. the fact that a circle typically fits a specific and rigid set of rules is an example of a _________.
prototype
formal concept
fuzzy concept
natural concept

Explanation:

A formal concept is defined by a specific set of rules or characteristics. A circle has a well - defined mathematical and geometric set of rules (all points on the circle are equidistant from the center), which makes it a formal concept. A prototype is a mental image that represents the average or most typical example of a category. A fuzzy concept has unclear boundaries. A natural concept is formed through experience in the natural world.

Answer:

B. formal concept