<p>Is there a difference?
And also is there a difference between which and that.</p>
<p>“Which” is used to describe an entire group (i.e. Hamburgers, which are very popular in the United States, are usually made of beef) and “that” is used to describe a subset of a larger group (i.e. Hamburgers that have cheese taste better than those that don’t). </p>
<p>I only know that cause it’s in one of my prep books :)</p>
<p>But I don’t know about the though vs. although.</p>