ANS:D - all the above.

A fluid particle may possess the displacement of:

• Translation
• Rotation
• Distortion

Therefore, the correct answer is: All of the above. In fluid mechanics, a fluid particle can undergo various types of displacement and deformation as it moves within a fluid flow field:

1. Translation: This refers to the movement of a fluid particle from one location to another within the flow field.
2. Rotation: Fluid particles can also rotate about their own axes or within the flow, especially in regions of high turbulence or vorticity.
3. Distortion: Fluid particles can experience deformation or distortion in their shape or configuration due to the forces acting upon them within the flow field. This deformation can occur due to shear forces, pressure gradients, and other fluid dynamic effects.

All these types of displacement are fundamental to understanding the behavior of fluids in motion and are key concepts in fluid mechanics. Therefore, a fluid particle may possess the displacement of translation, rotation, and distortion.