Answer:
a - article
canvas - adjective
Explanation:
Articles are defined as the part of speech that primarily functions to indicate, specify, and limit a noun. While the adjectives function to modify a noun or the noun's referent. In the given sentence, the indefinite article 'a' helps in specifying the identity of the singular noun 'canvas sack' and <u>'canvas' is the adjective as it is modifying the noun 'sack' by providing detail about it that it is made up of 'woven fabric</u>.'
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He wrote the Theogony, a hexametric poem on the genealogies of the gods, and Works and Days, which gave moral and practical advice and was the chief model for later ancient didactic poetry.