Final answer:
By adding 'ment' to 'require', the word changes from a verb to a noun without any phonetic changes, indicating the action or outcome of requiring.
Step-by-step explanation:
The part of speech of a word can be changed by modifying its ending, as shown with the example 'require' turning into 'requirement'. When we add 'ment' to the verb 'require', the word changes from a verb to a noun, indicating the action or the result of requiring.
This suffix 'ment' is commonly used to form nouns from verbs. For example, the word 'enjoy' becomes 'enjoyment', where 'enjoy' is the verb and 'enjoyment' is the noun, showcasing what comes from enjoying something.
Review
In analyzing the boldfaced word 'requirement', the stem is 'require' and the suffix is 'ment'. The original verb 'require' has undergone a change in part of speech through the addition of this suffix. No phonetic changes occurred when the suffix was added in this case.
Therefore, the correct answer to the change in part of speech for 'require' to 'requirement' is:
a. changes from verb to noun