Explanation:
1) Coral reefs are underwater ecosystems which are formed of colonies of Coral Polyps, a Famous and well-known Coral Reef is the Great Barrier Reef, which is located off the coast of Queensland, Australia.
2) A couple of threats to the world's oceans include, Plastic Pollution, Global Warming and Acidification.
Hope this helps
<span>19 years...........................</span>
I'm not too sure about this (it's been ages since I last learned about Henrik), but I'm certain he was exiled to Italy in the 1860's, from where he moved to Germany in 1868-ish.
Hope I helped!! xx
