The science of studying the feedback systems in humans, animals and machines is described as

The correct option is Cybernetics.

Detailed Explanation:
Cybernetics is the interdisciplinary study of control and communication in animals, humans, and machines. The field focuses on how systems (whether biological, mechanical, or social) process information, respond to it, and make adjustments to maintain stability or achieve goals.

Norbert Wiener, a mathematician and philosopher, coined the term in 1948 from the Greek word kybernetes (meaning "steersman" or "pilot"). Wiener defined cybernetics as "the scientific study of control and communication in the animal and the machine."

The key mechanism in cybernetics is the feedback loop. In a feedback loop, the system's output is monitored and used to adjust its future inputs or actions. For example:
- In humans and animals, sensory feedback allows us to adjust our physical movements (e.g., maintaining balance while walking) and regulate internal conditions (like temperature control, or homeostasis).
- In machines, a thermostat uses feedback from the ambient temperature to turn a heating system on or off, keeping the temperature stable.

Here is why the other options are not correct:
- Feedback science: Although feedback is central to the concept, this is not the formal name of the scientific field.
- Experience study: This refers to the examination of subjective human experiences (often in design or psychology) rather than systemic control systems.
- Message Hermeneutics: Hermeneutics is the study of text interpretation and meaning, which is unrelated to feedback and control mechanisms.