The correct answer is: D. fabricated on a tiny silicon chip.
An integrated circuit (IC), also known as a microchip, is a small electronic circuit that contains many tiny transistors, resistors, and capacitors. It is fabricated on a tiny silicon chip, which is a semiconductor material. ICs are used in a wide variety of electronic devices, including computers, cell phones, and cars.
Option A is incorrect because an integrated circuit is not necessarily a complicated circuit. Some ICs are very simple, while others are very complex.
Option B is incorrect because an integrated circuit is not necessarily an integrating device. An integrating device is a device that combines two or more signals into a single signal. ICs can be used to integrate signals, but they can also be used to perform other functions, such as amplification, filtering, and modulation.
Option C is incorrect because an integrated circuit is not necessarily much costlier than a single transistor. The cost of an IC depends on the number of transistors it contains, the complexity of the circuit, and the manufacturing process used to produce it.
Option E is incorrect because all integrated circuits are fabricated on a tiny silicon chip.