What’s the answer to this question

What happened in 2012 and how does it illustrate the importance of understanding the sun and how it works?

Which of the following ocean acidification? are the most likely side effects of a ph less than 7.0 in the ocean b. more metal salts altering the ocean chemistry c. dissolution of the shells of marine organisms d. both a & b e. all of the above.

If a polyatomic ionic compound has gained two hydrogen ions, then how does its name begin?