What is causing the TypeError 'reversed' is an invalid keyword argument for sort() in this code?

The error occurs because the built‑in sorted() function does not accept a keyword argument named "reversed"; it expects "reverse". The list method sort() also uses "reverse" as its keyword. In the snippet you passed "reversed=True", which is not a valid parameter, so Python raises a TypeError. To fix the code, replace the call with either sorted(num, reverse=True) or num.sort(reverse=True). Note that sorted() returns a new list, so you don’t need to call sort() on the original list. A corrected version would be:

def second_largest(num):
    return sorted(num, reverse=True)[1]

If you want to handle duplicate values and return the second distinct largest number, you can convert the list to a set first or keep track of two largest values while iterating. The key point is to use "reverse=True" instead of "reversed".