Answer 1

A for loop iterates through any iterable object one item at a time until all iterable elements have been explored. As a list has an index it can be called directly in a for a loop. You also could iterate over the list using the range of the length of the list range(len(list)) which would mimic the default beviour of just iterating through the list.

Option 1:
list = [1, 2, 3, 4]
for num in list:
print(num)

Option 2:
list = [1, 2, 3, 4]
for i in range(len(list)):
print(list[i])