Which of the materials is NOT recently mined from the ocean floor?

1.oil and gas
2.nodules
3.diamonds
4.phosphorites
HELP!!!!

4 answers

I don't see any science tutors online right now. Sorry.

You should NEVER post last-minute questions here.
It's not 1 or 3, that's a hint
Tell us what you think :)
diamond mining on the ocean floor? Hmmmm
This is no help
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