Which Vs That

[akanksha.soneja]

Jean-Jacques Rousseau contended that man is good only when in "the state of nature" but is corrupted by society, that compels man to compare himself to others.
- man is good only when in "the state of nature" but is corrupted by society, that
- only man is good when in "the state of nature" but is corrupted by society, that
- man is good when in "the state of nature" but is corrupted only by society, that
- only man is good when in "the state of nature" but is corrupted by society, which
- man is good only when in "the state of nature" but is corrupted by society, which

I marked the first choice for this question...But last choice is correct.I am confused between the usage of which and that..Can someone help me please?

[jlucero]

"That" introduces a relative clause that is essential to the sentence and is not introduced with a comma.

"Which" introduces a relative clause that is non-essential to the sentence and must be introduced with a comma.

The dog that is red belongs to me. (There's five dogs over there, but the one that is red is mind)

The dog, which is red, belongs to me. (There's only one dog, so knowing that it is red is non-essential)

[akanksha_soneja]

Thank you..:)

[jnelson0612]

:-)