Kinematics deal with the

The correct option is Motion of an object.

Step-by-step explanation:

1. Definition of Kinematics:
Kinematics is a subfield of physics, specifically a branch of classical mechanics, that describes the motion of points, bodies (objects), and systems of bodies without considering the forces or masses that cause the motion.

2. Focus of study:
In kinematics, we study parameters related to motion such as:
- Position
- Displacement
- Velocity
- Acceleration
- Time

3. Why other options are incorrect:
- Material property of an object: This refers to the physical characteristics of a substance (like density, melting point, etc.), which falls under materials science, not kinematics.
- Elastic property of an object: This relates to how objects deform and recover their shape under stress (governed by elasticity and Hooke's Law), which is studied under strength of materials or solid mechanics.
- Optical property of an object: This relates to how an object interacts with light (refraction, reflection, absorption), which is studied in optics.

Therefore, kinematics is concerned strictly with describing the motion of an object.