Answer and Explanation:
1.
La computadora - singular definite article (The) + noun
Las computadoras - plural definite article (The) + noun
Una computadora - singular indefinite article (A - an) + noun
Unas computadoras - plural indefinite article (A - an) + noun
2.
El cuaderno - singular definite article (The) + noun
Los cuadernos - plural definite article (The) + noun
Un cuaderno - singular indefinite article (A - an) + noun
Unos cuadernos - plural indefinite article (A - an) + noun
3.
La mujer - singular definite article (The) + noun
Las mujeres - plural definite article (The) + noun
Una mujer - singular indefinite article (A - an) + noun
Unas mujeres - plural indefinite article (A - an) + noun
4.
El chico - singular definite article (The) + noun
Los chicos - plural definite article (The) + noun
Un chico - singular indefinite article (A - an) + noun
Unos chicos - plural indefinite article (A - an) + noun
5.
La escuela - singular definite article (The) + noun
Las escuelas - plural definite article (The) + noun
Una escuela - singular indefinite article (A - an) + noun
Unas escuelas - plural indefinite article (A - an) + noun
6.
La fotografía - singular definite article (The) + noun
Las fotografías - plural definite article (The) + noun
Una fotografía - singular indefinite article (A - an) + noun
Unas fotografías - plural indefinite article (A - an) + noun
7.
El autobús - singular definite article (The) + noun
Los autobuses - plural definite article (The) + noun
Un autobús - singular indefinite article (A - an) + noun
Unos autobuses - plural indefinite article (A - an) + noun
8.
El diario - singular definite article (The) + noun
Los diarios - plural definite article (The) + noun
Un diario - singular indefinite article (A - an) + noun
Unos diarios - plural indefinite article (A - an) + noun
The highlighted terms indicate the singular items along with their corresponding definite and indefinite articles in front of the nouns.
The definite article denotes a noun that is already known to the reader (The), while the indefinite article refers to a noun in a more general manner (Un- una-unos-unas).
