When older media find new functions because their earlier functions are taken over by new technologies, the phenomenon is known as:

Correct option is A

Functional displacement refers to the process where older media or technologies find new roles or functions when their original purposes are taken over by newer technologies. This is common in the media industry, where older forms of media, such as newspapers or television, adapt to new roles as digital media or the internet take over their traditional functions. 

1. Functional displacement occurs when old technologies or media adapt to new roles due to the advancement of newer technologies.
2. It demonstrates how media systems evolve and adapt to the changing technological landscape.
3. Examples include how print media adapted to include digital formats in response to the rise of the internet and digital news.

• Alternative journalism refers to non-mainstream journalism that often challenges traditional media practices, but it is not related to the process described in the question.
• Existentialism is a philosophical theory concerned with individual freedom, choice, and existence; it is unrelated to the concept of media evolution.
• Experimentalism focuses on new and innovative methods of research or practice but is not linked to the media adaptation described here.