Please answer questions 1-9 by choosing the best option based on the definitions and context provided.

Here are the answers to questions 1 to 11:

1. The definition "refers to something that exists and can be experienced through the senses, especially when it is unusual, interesting, or not easily explained" describes a phenomenon.

   • The correct option is C) Phenomenon.

2. "Marginalized" means to treat something as insignificant or peripheral. The antonym would be to give it importance or attention. Among the given options, "focused" implies attention and importance.

   • The correct option is B) focused.

3. "Chaos" means complete disorder and confusion. "Disruption" means disturbance or problems that interrupt an event or process.

   • The correct option is D) disruption.

4. The common phrase is to "check" the flight departure time.

   • The correct option is B) check.

5. Doing the same tasks every day makes work repetitive.

   • The correct option is A) repetitive.

6. Children are often curious and might surround visitors.

   • The correct option is D) curious.

7. The idiom "face the music" means to accept the unpleasant consequences of one's actions.

   • The correct option is C) face the music.

8. Restaurants are typically less crowded on a weeknight compared to a weekend.

   • The correct option is D) weeknight.

9. The phrase "for over an hour" indicates an action that started in the past and continued up to the present, which requires the present perfect continuous tense.

   • The correct option is C) have been waiting.

10. The subject is "the engineers" (plural), so the correct reflexive pronoun is "themselves."

    • The correct option is A) themselves.

11. "So that" is used to express purpose. You back up files for the purpose of not losing data.

    • The correct option is C) so that.