<span>It is true that video-sharing sites such as Youtube and Vimeo provide a place to post short videos called clips. Nowadays, these videos aren't only short, because even full-length movies can be posted on Youtube. This platform has become an important place for contemporary creators given that it provides them with a location and money to share their creative thoughts with the world. Youtube is becoming more and more important today, which is obvious if you take a look at the number of visitors each month and the money that Youtube earns from its creators.</span>
Answer: The component that is used for most amplifiers is the transistor. Semiconductors like gold,copper etc. are used although poor semiconductors like silicon are sometimes used as well. There are many electronic circuits that all under the amplifier category. The classification of an amplifier depends on the size of the signal and configuration.
The third option is correct.
