A succession of ocean waves set in motion by a submarine earthquake (also known as underwater earthquake) is called a tsunami. This happens when tectonic plates move, converge, or subduct. Submarine earthquakes are common in Asia where there’s a submarine earthquake zone called Pacific Ring of Fire.
Closed ecological systems are ecosystems that do not rely on matter with any part of an outside ecosystem. An example of closed ecosystems are aquarium ecospheres.
The Danube forms a part of the border between Serbia and Romania.
It later also forms a part of the border between Romania and Bulgaria and before also Serbia and Croatia.
It also passes through 4 European capitals: Bratislava, Vienna, Budapest and Belgrade
The reddish-orange colour of weathering of volcanic ash is most likely due to its iron sulfide content which oxidizes to iron oxide so that limonite is yellow and hematite is red and in ash since it is such fine grained material it weathers more rapidly because it has a large surface area.
Answer: Military
Explanation: I'm not 100% sure but that looks like a planning map from D-Day so it looks like landing plans on a beach for soldiers
