Hisdlife ,that is beingimplied here.
So, all the following are correct:
i)My Dad says that hard work, works.
ii)My Dad says hard work, works .
iii)Hard work, my Dad says, works .
Similarly, here, the sentence is conveying:
Experts say that the survival of coral colonies, which are composed of innumerable tiny polyps living in a symbiotic relationship with brilliantly colored algae, is being threatened not only by pollutants such as agricultural runoff, oil slicks, and trash, but also by dropped anchors,
...
So, all the following are correct:
i)My Dad says that hard work, works.
ii)My Dad says hard work, works .
iii)Hard work, my Dad says, works .
Similarly, here, the sentence is conveying:
Experts say that the survival of coral colonies, which are composed of innumerable tiny polyps living in a symbiotic relationship with brilliantly colored algae, is being threatened not only by pollutants such as agricultural runoff, oil slicks, and trash, but also by dropped anchors,
...




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