How does an ETF make money?

Related questions

1. What is the best ETF to short the market?
2. Can I invest in Nasdaq from India?
3. Can I trade US stocks from India?
4. Are ETF better than mutual funds?
5. What is Russell 1000 composed of?
6. Is there a Russell 2000 index fund?
7. What is in the QQQ ETF?
8. Is QQQ a leveraged ETF?
9. Can you buy stock in Nasdaq?
10. Does Russell 2000 include S&P 500?

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4. #funds
5. #likewise
6. #investing
7. #income
8. #holds
9. #makes
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11. #depends
12. #interest
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14. #identically
15. #investments
16. #mutual
17. #essentially