Shem is the son of Noah traditionally associated with the line leading to Abraham.
Genesis 10 places Shem at the head of a genealogy of peoples, and Genesis 11 traces a line from Shem through Arpachshad and later generations to Terah, the father of Abram, who is later called Abraham. This genealogical connection is the basis for the answer.
Shem is one of Noah’s three named sons, alongside Ham and Japheth. The biblical text does not present these genealogies as a modern genetic population study; they function within the narrative as ancestral and national lineages.
The term “Semitic” was later formed from Shem’s name and has been used in historical and linguistic classifications. It is not a synonym for every person in Shem’s biblical genealogy, and the biblical passage itself does not use the modern scientific concept of ethnicity.