Why is Jordan called the Hashemite Kingdom?

The Hashemite name is derived from Hashem, a grandson of Qusai and the great-grandfather of the Prophet Mohammad (peace be upon him). The Hashemites of Jordan are thus direct descendants of the Prophet through his daughter, Fatima, and her husband, Ali.

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Explanation:

The country is named after the River Jordan, which runs between Jordan and Palestine. The word Jordan means "flow downwards". The region has a long history as an essential trade center for all great empires since the ancient world until now. Evidence of Jordan's history dates as far back as 7,000 years before Christ.

The Hashemite name is derived from Hashem, a grandson of Qusai and the great-grandfather of the Prophet Mohammad (peace be upon him). The Hashemites of Jordan are thus direct descendants of the Prophet through his daughter, Fatima, and her husband, Ali.

the graph shows the spread of railways in the 1800s.

based on the graph, the conclusion that can be drawn about germany is answer d)   by 1880, germany had more rail lines than great britain and russia.