2. ¿Cuál de los mensajes contiene artículo, sustantivo verbo y adjetivo? Las aves cantan hermosas melodías. .
Rolando ríe.
Los niños visitan la feria cortésmente.
El pato come.
La fría nevada cayó en la ciudad capital.

Of the messages, the sentence containing noun, verb and adjective is:

1) " Birds sing beautiful melodies ":

Article : The

Noun : birds

Verb : sing

Adjective : beautiful

2) " Rolando laughs" :

Article: This sentence has no articles.

Noun : Rolando

Verb : laugh

Adjective : this sentence does not have adjectives.

3) " Children visit the fair politely ."

Article : los.

Nouns : children, fair

Verb : visit

Adjective : it has no adjectives, politely it is an adverb that modifies the word fair (noun)

4) " The duck eats "

Article : the.

Nouns : duck

Verb : come

Adjective : does not have adjectives

4) " The cold snow falls in the capital city "

Article : the.

Nouns : nevada, city

Verb : falls

Adjective : cold, capital

You can read:

Explanation: