Answer:thhat sucurity must be dobled
Explanation:after this attack a close eye was kept on american citisens
<span>Rain usually falls in Mecca in small amounts between November and January. The </span>rainfall<span>, as scant as it is, also presents the threat of flooding and has been a danger since the earliest times. </span>
Following the growth of television in the late 1940s and early 1950s, radio reinvented itself to become a companion medium, serving narrow niche audiences with specialised formats is true.
The so-called Golden Age of Radio occurred between 1930 and the mid-1950s. However, it may seem contradictory that such a fruitful cultural occurrence arose during this decade.
As music came to rule the airwaves, FM radio drew in new listeners because of its high-fidelity sound capabilities.
The late 1960s saw new disc jockeys taking greater liberties with playing several songs in a row before going to a commercial break or airing album tracks that exceeded 10 minutes in length.
To know more about radio here:
brainly.com/question/3186183
#SPJ4
The theory that individuals, groups, and peoples are subject to the same Darwinian laws of natural selection as plants and animals. Now largely discredited, social Darwinism was advocated by Herbert Spencer and others in the late 19th and early 20th centuries and was used to justify political conservatism, imperialism, and racism and to discourage intervention and reform.
-hope this helps :)
