Which of the following is NOT correct regarding coral bleaching?
A) The warming of sea-surface temperatures is a great threat to coral.
B) The 1998 El Nio event caused the die-off of an estimated 30 of the world's reefs
C) Scientists have identified the reasons polyps eject their algae.
D) Coral reefs are under pressure from overfishing, pollution, sedimentation, and global warming.
Question 2
The Richter scale replaced the moment magnitude (M) scale for measuring earthquake magnitude.
Indicate whether the statement is true or false