Choose the sentence with no spelling error. 

The correct answer is 'Option 4'.

Key Points

• The sentence with no spelling error is option 4: "Protest is also a safety valve."
• In this sentence, all words are spelled correctly according to English language standards:
  • "Protest" - means a statement or action expressing disapproval of or objection to something.
  • "is" - is the third person singular present of "be".
  • "also" - means in addition or too.
  • "a" - is an indefinite article used before words that start with a consonant sound.
  • "safety" - means the condition of being protected from or unlikely to cause danger, risk, or injury.
  • "valve" - is a device for controlling the passage of fluid through a pipe or duct, especially an automatic device allowing movement in one direction only.

Therefore, the correct sentence is: 'Protest is also a safety valve.'

Additional Information

• The other sentences all contain at least one word that is misspelled:
  • "saffety" should be "safety".
  • "valvve" should be "valve".
  • "Protast" should be "Protest".