Answer:
6 columns/items
Explanation:
grid starts off as an empty list ( [ ] ), so right now it has 0 items/columns.
After that, 3 new items ("frog", "cat", "hedgehog") have been appended to grid, it now has 3 items
Finally another 3 items are appended to grid ("fish", "emu", "rooster"), finally grid ends up with 6 items in total.
