The correct answer is (c) silicon.
Silicon is a semiconductor material that is used to make integrated circuits (ICs). ICs are the building blocks of computers and other electronic devices. They are made up of millions or billions of tiny transistors that are etched onto a thin slice of silicon. The transistors are arranged in circuits that perform specific functions, such as adding, subtracting, or storing data.
Silicon is a good material for ICs because it is a semiconductor. This means that it can be either a conductor or an insulator, depending on the amount of current that is applied to it. This property allows ICs to be used to create circuits that can perform complex functions.
In addition to silicon, ICs also contain other materials, such as metals and insulators. These materials are used to create the connections between the transistors and to protect the IC from damage.
I hope this helps!