Im pretty sure the answer is prejudice :)
The given character traints can be matched with the characters of Romeo and Juliet as follows:
Reasonable and Calm || <span>Benvolio
</span>Benvolio is Romeo's cousin. He is portrayed as an often quiet and calm character.
Aggressive and hot-tempered || Mercutio
Mercuito is Romeo's closest friend, and a blood relative. Hi is portrayed as an aggressive character, who lost his life while protecting the Montague name.
Romantic and Impulsive || Romeo
Romeo is on of the main characters. He is portrayed as the lover boy, who is very romantic and quite impulsive too.
The answer for no 1 is conflict no 2 conflict
The definition of antithetical is something that is contrary or opposite.
An example of something that is antithetical is eating meat if you are a vegetarian.
