one that immigrates: such as. a : a person who comes to a country to take up permanent residence. b : a plant or animal that becomes established in an area where it was previously unknown.
or
Immigrant sentence example. There is a large Indian immigrant population. The immigrant population is concentrated in or near the large cities. Boston is the second immigrant port of the country.
The word “immigrant” means someone who originates from a different country but often settles and starts their life in a different one which is called “immigration” example: someone from Italy immigrates to the United States to start a new life and settle his/her life in the U.S
C. The author uses a simile to compare the feeling of nervousness to melting because the sentence uses the word "like," which is an underlying hint to similes. Without it, it would be a metaphor.