C, probably, seeing as non -gm crops are definitely not as controversial, and its definitely not A and B. <span />
Answer:
Unique Biodiversity. Eighty percent of the world's known terrestrial plant and animal species can be found in forests, and tropical rainforests are home to more species than any other terrestrial habitat. A square kilometer of forest may be home to more than 1,000 species.
Explanation:
It is a <span>photosynthetic algae contained in reef building corals underwater</span>
