Reverse a linked list.

Focus on clearly explaining your approach to reversing a linked list, emphasizing both iterative and recursive methods. Start by outlining the structure of a linked list and the pointers involved. When discussing the iterative method, detail how you will traverse the list while adjusting the pointers to reverse the links. If you choose the recursive method, explain the base case and how you will handle the recursive calls to achieve the reversal. Be prepared to write clean code and discuss the time and space complexity of your solution.