Why were the 7 hills that surround rome to the city's development?

The seven hills that are surrounding the city of Rome were of great importance for its development because they were excellent strategic defense points that enabled the Romans to protect their city much more easily than if it was surrounded by plains. When it came to the defense of the city, the seven hills were offering a big advantage to the Romans of always having the high position in the battles which is more often than not a crucial factor in winning or losing, thus the city was able to develop in relative security from being attacked or invaded.

angel island immigration station was an immigration station located in san francisco bay which worked from 1910 to 1940. the majority of immigrants that got there were from the asian hemisphere, specifically from china, japan, russia, and south asia, being china the country from where more people arrived.

the number of foreigners arriving at it took the attention of americans who feared the new arrivals would take their jobs. the work opportunities were not abundant due to the economic comedown of 1870 and the asians, as newcomers, were willing to work for cheaper wages. soon they started to be seen as a threat, which led to an increased discrimination against the chinese - the biggest ethnicity arrived at this station until 1915 when japanese immigrants outnumbered them - being considered as unsuitable americans hence their looks and social situation.

at the station, the immigrant's detention may vary depending on how long the interrogation process took: it could be weeks, months, or even years.

finally, in 1940 an explosion destroyed administration building located on the island, so the united states government decided to stop the process.