b. expression of quantity (with articles and other quantifiers)

# videos: on the following subpage
1) articles: a, an, the
Article is "a kind of determiner, occurring in many languages including English, that lacks independent meaning but may serve to indicate the specificity of reference of the noun phrase with which it occurs." 
a) definite article: "a determiner that expresses specificity of reference, such as the in English."
b) indefinite article: "a determiner that expresses nonspecificity of reference, such as a, an, or some."
(from: http://www.thefreedictionary...)

2) other quantifiers: e.g., some, all, many, much, few