A dictionary is a source you can use to find definitions of words.
A thesaurus is a source you can use to find synonyms/antonyms for certain words.
These two combined can help you choose words that are not commonly used and it can improve your vocabulary range. I personally use a thesaurus way more than a dictionary to find synonyms for common words such as “good” or “smart”
Answer:
can i ask which lesson this question belongs to?
Well mostly they are: I, me, we, us, my, mine, our, ours, myself, ourselves.