The given figure is a diagram of a diode. A diode is an electronic component that allows current to flow in only one direction. It has two terminals, an anode and a cathode.

Explanation:
The correct answer is option 'C', which states that the given figure represents a diode. Let's understand why it is a diode by analyzing the figure:

- The figure shows a symbol of a diode, which looks like a triangle with a line at one end and an arrow at the other. This symbol is widely used to represent a diode in electronic circuits.

- The line in the diode symbol represents the cathode, which is the negative terminal of the diode. The arrow represents the anode, which is the positive terminal of the diode.

- The diode allows current to flow in only one direction, from the anode to the cathode. This property of a diode makes it useful in many electronic applications such as rectifiers, voltage regulators, and signal detectors.

- When a voltage is applied to the diode in the forward direction (anode positive and cathode negative), the diode conducts and allows current to flow through it. However, when the voltage is applied in the reverse direction (anode negative and cathode positive), the diode does not conduct and blocks the current flow.

Therefore, based on the above analysis, we can conclude that the given figure represents a diode.