The correct answer is D. ocean floor mapping and earthquake tracking
Tracking earthquakes is helpful because it shows where it came from and what caused it, as well as how it affected the environment, while ocean floor mapping is useful because it shows how the bottom of the sea changed over time which happens due to tectonic activity.
European Countries can retain their cultural identities by excelling and polishing what they are good at.
<u>Explanation:</u>
European Countries can retain their cultural identities by excelling and polishing what they are good at. This can be proven by certain examples;
<u>Example 1:</u>
Volkswagen, a German Car manufacturer that is known to make durable cars. Due to its becoming famous during World War II, it has found its success by exporting to other countries and providing cars that were up to the mark and were made using state of the art materials.
<u>Example 2: </u>
Switzerland is known for its cheese. It’s so famous that it’s known all over the world by the name of Swiss Cheese. Swiss cheese has become so famous that it has become an integral part of all types of cuisines all over the world.
I would like to refer you to this website, it has everything you are asking about--
http://thediplomat.com/2015/01/china-the-influence-of-history/
Hope this helps!