Read each sentence carefully and select the option with the sentence written correctly. la chica necesita el falda rojo. la chica necesita la falda roja. la chica necesita los faldas rojas. la chica necesita las faldas rojos.

la chica necesita la falda roja.

- La chica necesita la falda roja.

Explanation:

The sentence "la chica necesita la falda roja" is the correct option because in Spanish the article, the noun and the adjective must agree in number and gender. That doesn't happen in English:

-The girl needs the red skirt.

-The boy needs the red skirt.

As you can see, in English is not important the agreement between the article and the noun because nouns, adjectives and articles don't have a gender.

-La chica necesita el falda rojo.

This sentence is wrong because there's no agreement between the singular article "el" and the singular noun "falda". A singular female article is required. Besides, the singular adjective "rojo" is a male adjective. So there's agreement between the article and the adjective but not with the female noun "falda".

-La chica necesita los faldas rojas.

In this case, there's no agreement between the plural male article "los" and the plural female noun "faldas" and the plural female adjective "rojas". So the sentence would be well written in the following way: "la chica necesita las faldas rojas". So a female plural article is required.

-La chica necesita las faldas rojos.

In this case, there's no agreement between the male plural adjective "rojos" and the female plural article "las" and the female plural noun "faldas" because a plural female adjective is required.