Make the first selected objects follow last selected 'animation path' object.

Select two or more objects. The first selected objects will be moved along the last 'path' object. Define path options through the Control Bar and accept the tool via the View's pop-up menu or by clicking the Accept button on the Control Bar. This creates a path keyframe animation.

The Path tool has the following options:

[Note] Note
The path tool estimates the horizon plane from the curve geometry. If the curve is not planar, the estimate may be not what was intended. In that happens, just unmap the target, edit the horizon axis and map the target again to the path level, but this time with the default path options (torsion from the path, no constant speed) to avoid nested path levels.