this is super great, my only suggestion is to combine sentences, because I feel like your paragraph is very chunky.
(: it's awesome!
Answer:
An American politician who served as a Republican U.S. Senator from the state of Wisconsin starting in 1947. He is known for alleging that numerous communists and Soviet spies and sympathizers had infiltrated the United States federal government, universities, film industry, and elsewhere. Ultimately, the smear tactics that he used led him to be censured by the U.S. Senate.
Explanation:
The grinding away of rock by another rock is called erosion.
