Find out whether the underlined words in the given sentence is ‘definite’ or ‘indefinite’ articles:

Start doing the textual exercises.

The correct answer is: Definite

Articles are either definite (the) or indefinite (a or an). The indefinite article 'a' is used before a consonant and 'an' is used before a vowel. Definite article 'the' is used when the speaker talks about a specific object.
'Start doing the textual exercises', here 'the' is a definite article.