Which is correct?
The Amazon represents over half of the planet's remaining https://en.m.wikipedia.org/wiki/Rainforest, and comprises/is comprised of the largest and most biodiverse tract of https://en.m.wikipedia.org/wiki/Tropical_rainforest in the world, with an estimated 390 billion individual trees divided into 16,000 species.
Thanks
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There is a discussion about "comprised of" at https://www.merriam-webster.com/words-at-play/can-you-use-comprised-of-grammar