Answer:
1). Un hombre.
2). Unos turistas.
3). Una profesora.
4). Un conductor.
5). Unos estudiantes.
Explanation:
An article is defined as the words or adjective that functions to define or modify a noun which could be a person, idea, place, or thing.
Definite articles are demonstrated as the determiner like 'the' that serve to modify a specific noun about which the readers has already identified.
Indefinite articles are contrary to the definite article as it includes articles like 'a', 'an' that function to describe a noun that has not been specified by the author.
1). el hombre(Spanish) meaning 'the man' includes a definite article 'el' means 'the' which could be used to refer to a specific man. It replaced by 'un' meaning 'a' that exemplify an indefinite article to refer to any man in general.
2). los turistas meaning 'the tourists' involves a definite article 'the'. Thus, an indefinite article could be 'unos' meaning 'some' to modify the noun 'tourists'.
3). la profesora implies 'the teacher' which carries a definite article 'la' meaning 'the'. It could be replaced with the 'una' i.e. an indefinite article that modifies 'teacher' in general.
4). el conductor gives the meaning 'the driver' could employ 'un' meaning 'a' as an indefinite article to replace the definite article 'el' and describe the noun 'driver' indefinitely.
5). los estudiantes implies 'the students' has a definite article 'los'(the). It could be replaced with the indefinite article 'unos' meaning 'some' to describe the plural noun 'students' generally.
