Number 4 plz. i don’t know what it means by groups.

Why do many scientists suppose the land bridge theory of migration?

What did the mexican solders eat during 1833

Han put the last box into the back of his car and turned to look up at his dorm room. he saw himself through the window, laughing with his roommates and sharing his hopes and dreams. he saw all of the hours spent studying and the celebrations at the end of each semester. he smiled fondly as he turned away, got into his car, and drove off. which literary element does the passage contain?