Which of the following statements about coral reef preservation efforts is true? a. in order to preserve coral reefs, all aquarium trade in coral reef organisms must end. b. legislation has had no impact on coral reef preservation efforts. c. various preservation methods have had some positive impact on coral reef preservation. d. education of fishermen has eliminated all coral reef loss.

Explanation:

c. Various preservation methods have had some positive impact on coral reef preservation.

Explanation:

Degradation of coral reefs is due to the concentration of carbon dioxide in the atmosphere, which has increased in recent decades at a rate of several orders of magnitude above the values estimated for the last 400,000 years, proving that climate change is not just a factor. fact but also that they already have their consequences. Coral reefs have been cited as the first and largest ecosystem to suffer significant impacts, triggering these changes.

Degradation of coral reefs has a major negative impact on biodiversity and nature in general, so there is a frequent concern to develop methods and techniques for preserving coral reefs. Although these methods and techniques need to be formulated through much research and testing, it can be argued that various preservation methods have already had some positive impact on the preservation of coral reefs.

the answer is:

carbon dioxide