"Violence breeds violence." In the light of this comment, consider Emily Bronte's presentation of violence in the novel Wuthering Heights.

In my experience, the best way to approach such questions is to first think of examples from the text that the question/quote is relevant to. In this case, there are many examples of violence in the novel Wuthering Heights: there is Lockwood attacking the ghost he encounters during the night he spends at the Heights; Isabella's attempt to escape the Heights; the fight between Linton and Heathcliff in the kitchen at Thrushcross Grange.
We will start by first focusing on a couple of examples of physical violence that support the quote. Lockwood is a gentleman from the city, and yet he enacts shocking violence on the ghost of a child. In so far as he is a stranger to the landscape and becomes Nelly Dean's audience, this could in some way be emblematic of the novel's influence on the reader, too. Isabella is a lady, and of the landowning class, and portrayed as meek in opposition to Catherine. Yet once she has been kept captive at the Heights and subsequently escaped, we see her try to smash her wedding ring with a poker, and tell Nelly how she wishes Heathcliff to suffer. From these examples, it certainly seems that the Gothic setting breeds violence in the novel's characters in spite of their better instincts.
Now, let us think about the ways in which we might disagree with the quote in order to reach a more nuanced understanding. Much of the violence in the novel seems to be not from actions and reactions between individual characters, but from the clash of social spheres - the Grange and the Heights; old Mr Earnshaw bringing Heathcliff to the Heights and the reaction of Hindley and Catherine to their new sibling. Violence could in fact be bred from entrapment: the transformation of Isabella comes from her captivity at the Heights; Catherine and Heathcliff seem perfectly harmonious while on the moors together, but the rules and regulations of their society keep them indoors and prevent them from being together.
Finally, decide what our eventual 'yes but no' conclusion will be, and link it all together!