Answer:
Cause they were Jewish and the German soldiers were after them.
Step-by-step explanation:
Number the stars is a fiction story written by Lois Lowry it narrates the story of a Jewish family, the Rosens, while they are escaping Copenhagen in the middle of Worl War II, while the German soldiers invade the capital the family needs to escape, and Annamarie, a 10-year-old girl is instructed by her parents to run away as fast as she can from german soldiers as they were taking Jewish population to concentration camps.