Final answer:
This question is about vocabulary words and their definitions that fall under the subject of English, suitable for middle school level students.
Step-by-step explanation:
- urgently needed; absolutely necessary
- to think deeply about something from the past
- First of something!
- a group of people that lived at the same time and are the same age
- a group of workers that protects the rights of those workers
- not caring or lacking interest
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