Answer:
The correct answer is -ward(s)
Explanation:
A suffix, also known as postfix, is one or more letters attached to the end of a word, which brings as result a new word. Such new word is often a different word class from the original word.
Among the most common suffixes, it is possible to highlight noun suffixes, such as -er and -ism, adjective suffixes, such as -ful and -able, verb suffixes, such as -are and -en, as well as adverb suffixes, such as -ly and -ward(s). As in the case of the example provided. Where the suffix -ward(s), added to direction words like north, south, etc, means toward that direction.
