1) Vincent y Monica están cansados.
Cansados is plural for cansado/a
4) Paloma está enamorada con su novio.
Enamorada is singular feminine
5) Los abuelos de Irene están contentos.
Contentos is plural for contento/a
Hope this helped :)
It would be “más grandes que” because if it were to be “menos grandes que” , it means less bigger than . The other answer choices don’t make since therefore, the answer is “más grandes que” hope this helps!