input: Write a python function to return the element at a specific index of a list.
  assert get_element_at_index(["Apple", "Banana", "Cherry", "Date"], 2) == "Cherry"
  assert get_element_at_index(["Dog", "Cat", "Bird", "Fish"], 0) == "Dog"
  assert get_element_at_index(["Red", "Blue", "Green"], 1) == "Blue"
output: def get_element_at_index(lst, index):
      return lst[index]