1. U. S. A.
  2. UK
  3. Green Land
  4. Russia
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1 Answers

Answer: Option 1

Silicon Valley, in the southern San Francisco Bay Area of California, U. S. A. is home to many start-up and global technology companies. Apple, Facebook and Google are among the most prominent. It’s also the site of technology-focused institutions centered around Palo Alto's Stanford University.

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