Final answer:
When a plane intersects a cone parallel to the base, the conic section formed is a circle, represented by the equation x^2 + y^2 = 32, which indicates a circle with radius √32.
Step-by-step explanation:
The conic section formed when a plane intersects a cone parallel to the base is a circle. The general equation for a circle is x^2 + y^2 = r^2 where r is the radius of the circle. Given the choices in the question, the equation x^2 + y^2 = 32 represents a circle with a radius of √32.