I think the following code completes the task correctly (i.e. adds the students from one list to the other using a for loop):
students_period_A = ["Alex", "Briana", "Cheri", "Daniele"]
students_period_B = ["Dora", "Minerva", "Alexa", "Obie"]
for student in students_period_A:
students_period_B.append(student)
print(students_period_B)
Each time the for loop completes, an element from list A is appended to list B.
After several iterations of the loop, students_period_B contains all the elements from students_period_A
When the loop is complete, the students_period_B list is printed (notice that this instruction is after the indentation but not indented itself and therefore won’t run until the loop is complete).