The navigational device is an example of <u>Arabesques</u>-Islamic artistic technique.
<u>Explanation:</u>
Islamic astrolabe is widely used in astronomical field for measuring the altitudes of celestial bodies. Astrolabe was used as a navigation instrument by many sailors, intelligent philosophers and astrologers.
Greek astronomer Hipparchus invented astrolabe. Muslims used astrolabe to find the direction of Mecca.
The astrolabe helps in determining the local time and latitude, and measuring the angles of stars. Astrolabe helps in locating the positions of the Sun, Moon and planets.
During the early years of the Cold War, West Berlin was a geographical loophole through which thousands of East Germans fled to the democratic West. In response, the Communist East German authorities built a wall that totally encircled West Berlin. It was thrown up overnight, on 13 August 1961.
Answer:
Demand for rubber was another factor that promoted European imperialism in the late nineteenth century, however, it was not the single factor.
Explanation:
The main goal of European imperialism was to extract economic resources from the colonized nations. Some of these resources were: gold, silver, rubber, coal, agricultural products such as sugar cane, and so on, and the specific type of resources varied depending on the geographical region that was colonized.
As a result, demand for rubber was another drive for European imperialism, in the particular regions where it is obtained: the Amazon Basin and the Congo Basin.
This imperalism was stronger in the Congo Basin, simply because they countries that form the Amazon Basin were independent nations by then (Brazil, Colombia, etc), while the Congo Basin was dominated by the French and the Belgian empires, where the local populations were subjected to brutal treatment, especially by the latter.
