What type of Studio Spline lets you create a spline by constructing and manipulating spline poles?

The right choice is 'By Poles' because this type of Studio Spline allows users to create and manipulate the spline through the use of poles, which act as control points. When you utilize the 'By Poles' method, you have the flexibility to define the shape of the spline by placing and adjusting these poles in 3D space. This direct manipulation allows for intuitive control over the curvature and overall geometry of the spline, making it easier to design smooth and complex shapes.

In contrast, other options may involve different methodologies for spline creation that do not specifically utilize the concept of controlling the spline shape through poles. For instance, 'Dynamic Poles' typically involves interactions that might not directly reflect the adjustment of positions for spline control but rather a more generalized manipulation. 'Through Points' indicates a spline that is created to pass through predetermined points, which restricts design freedom compared to using poles. The 'Pole Constructor' is more of a descriptive term for a method but is not specifically recognized as a defined spline type in the context provided. Thus, 'By Poles' is the most accurate terminology related to the described spline creation process.