Answer
I: paraboloid
II: cone
Work Step by Step
Contour map I:
as we move away from the origin in equal increments, (say along x in the positive direction), the level curves get closer together, indicating that z-values increase with an increasing rate as (x,y) moves away from the origin, indicating a paraboloid.
Contour map I:
the level curves are evenly spaced, meaning that the rate of increase of z is constant, indicating a cone.