What explains the behavior of the alphabet letters in the bowl when you rotate it?

The behavior of the alphabet letters in the bowl during rotation can be explained by their inertia. Inertia is a property of matter that describes its resistance to changes in motion. When the bowl is rotated, the letters experience a force that tries to pull them toward the center of the bowl's axis of rotation. However, due to their inertia, they tend to maintain their initial state of motion, which leads them to move outward away from the center.

As the bowl continues to spin, the letters will not instantaneously change direction due to their inertia and will continue to slide outward against the walls of the bowl. The combination of this inertia and the centrifugal effect from the rotation results in the observed behavior of the letters. They do not simply float or adhere to the sides of the bowl, but rather, their resistance to changing their state of motion significantly influences how they behave in the rotating system.

In contrast, the other options, such as buoyancy or being "sticky," do not properly describe the fundamental mechanism of inertia which is primarily responsible for the letters' behavior upon rotation.