Which of the following is not a threat to barrier reefs? a. overfishing b. pollution c. logging d. global warming

Can someone me? i need to have this done as soon as possible! i'm putting 20 points on this!

When reading a textbook blank. a) it’s safe to assume that the ingot is not biased b) you should watch for fallacies in information and author bias c) you should fact check everything you read d) it is understood that academic sources are not biased

Plzz on what physical process is responsible for the creation of volcanoes, earthquakes and ocean trenches at the plate margins?