Bonjour !
Vos cousins sont drôles. ► CORRECT
<em>Your cousins are funny.</em>
<em />
explanation
<em>- Vos chat? aiment le poulet. </em><em>the name chat should have an "</em><em>s</em><em>" -> plural because the verb is conjugated </em><em>-ent </em><em>= 3rd pers. plural. and "drôle</em><em>s</em><em>" is plural as well. Vos = possessive adjective plural 2nd person plural</em>
<em>correct is </em><em>Vos chats aiment le poulet</em>
<em>-</em>
<em>- </em><em>Votre frère</em><u><em>s</em></u><em> </em><u><em>sont </em></u><em>méchant</em><u><em>e</em></u><em>s ► correct is "Votre frère est méchant"</em>
<em>Your brothers are mean ► your brother is mean</em>
<em> Here the sentence is probably singular. so you have to change all the plural words.</em>
<em>Votre</em><em> = ok</em>
<em>frères =</em><em> frère </em><em>(no "s")</em>
<em>sont = 3rd p. plur. ==> </em><em>est </em><em>= 3rd pers. sing.</em>
<em>méchantes (fem. plural)</em><em> ==</em><em>=> méchant (masc.sing.)</em>
<em>méchant = masc. sing.</em>
<em>méchante = fem. sing</em>
<em>méchants = masc. plur.</em>
<em>méchantes = fem. plur.</em>
<em>the adjective méchant MUST agree with the noun.</em>
<em>-</em>
- <em>Votre maman sont sympa. ==> Votre maman </em><u><em>est</em></u><em> sympa.</em>
<em>your mother are cool. ==> your mother is cool (correct)</em>
<em>the only word to change is the verb "être"</em>
<em>"sont" 3rd pers. plur. ==> "est" 3rd pers. sing.</em>
<em />
<em>ÊTRE présent</em>
<em>je suis </em>
<em>tu es</em>
<em>il/elle/on est</em>
<em>nous sommes</em>
<em>vous êtes</em>
<em>ils/elles sont</em>
<em>-</em>
<em>hope my explanations are clear enough to understand the mistakes in the sentences.</em>
<em />
<em>☺☺☺</em>