It is asking you to identify the suffix used to make an adverb.
Let's practise

Circle the suffix that can be added to the word below to make it an adverb.
ness ful ly ment

- Read the question carefully and read it again. What is it asking you to do?
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- Remember that an adverb describes a verb. If you do not know which suffix is used for an adverb, work out which suffixes make correct words.
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quick + ness = Yes
quick + ful = No
quick + ly = Yes
quick + ment = No
- Try out the correct words with a verb, e.g. to think.
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I think quickness = No
I think quickly = Yes
- Circle the correct option.
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ness ful ly ment
- Check your answer.