The tech hub south of San Francisco is known as what?

Here is the question :

THE TECH HUB SOUTH OF SAN FRANCISCO IS KNOWN AS WHAT?

Here is the option for the question :

• Caltech
• Silicon Valley
• Left Coast
• Palo Electro

The Answer:

And, the answer for the the question is :

Explanation:

[STC006502] In the 1920s, a technological cluster grew in the vicinity of Palo Alto, California, spurred by the intellectual environment of Stanford University, driven by the early tech firms founded by William Hewlett and David Packard. The region soon got the term ‘Silicon Valley’ due to the silicon-based semiconductors featured in the tech products created by computer companies. Apple, Facebook, HP, Intel, Google, and Facebook all have regional headquarters nearby.