Correct Answer: Float

Solution : The correct choice is the first option.

Explanation:
Levitate means rising or hovering in the air, typically without apparent physical support.
Float is the synonym, as it means to remain or move on the surface of a liquid or in the air without sinking.

The meanings of the other options are as follows:

• Laydown means to place or position something horizontally or to provide a clear statement or directive.
• Rusticate means to suspend or expel a student from an educational institution as a disciplinary measure.
• Walk means moving on foot, typically involving a series of steps.

Therefore, the correct answer is float.