Es, since the subject is él
Answer: It looks like you just need to cut off the last vowel (and consonant if there is one) of the word.
For number one, it's "perezosísimo"
For question 2, it's "aburridísimo"
For question 3, I think you do the same but keep it plural, so "interesantísimos" I would imagine.
The name of the knife that was carried by gauchos is called an Facon.
Answer:
No creo que sea correcto, ya que son animales y estan acostumbrados a viir en la naturalesa con otros animales.
Explanation: