Point Function:
A point function is a function that depends only on the current state of a system and not on the path taken to reach that state. It is also known as a state function or a state variable. The value of a point function is determined by the state variables of the system at a specific point in time.

Examples of Point Functions:
1) Heat: Heat is not a point function. It is a form of energy transfer between two systems due to a temperature difference. The amount of heat transferred depends on the path taken and is not solely determined by the state variables of the system.

2) Work: Work is not a point function either. It is the energy transfer that occurs due to a force acting on a system and causing it to move. The amount of work done also depends on the path taken and is not solely determined by the state variables of the system.

3) Thermal Conductivity: Thermal conductivity is not a point function as well. It is a property of a material that describes its ability to conduct heat. It is not a characteristic of the system itself and does not solely depend on the state variables of the system.

4) Kinetic Energy: Kinetic energy is a point function. It is the energy possessed by an object due to its motion. The kinetic energy of an object is solely determined by its mass and velocity, which are state variables. It does not depend on the path taken to reach a certain state.

Conclusion:
Among the given options, only kinetic energy is a point function. It satisfies the criteria of being solely determined by the state variables of the system and not dependent on the path taken.