<p>What's the difference between "in which" and "that"?</p>
<p>Sentence:
In a world that the rate of change accelerates, change itself seems to be the only constant.
Why can't "that" be used in the underlined portion?</p>
<p>Basically “in which” is mostly used for places, whereas “that” is used for things.
ex:</p>
<p>The room in which I studied.
The book that I studied.</p>
<p>that can still be used for places, though:
“The room that I studied in”</p>
<p>I hope this was at least slightly helpful.</p>
<p>
The beginning of this sentence implies that the rate of change accelerates the world, which makes no sense.
Here is a correct sentence using “that” and its implication:
SENTENCE: “I have a fork that I use to eat.”
IMPLICATION: “I have a fork, and I use the fork to eat.”
The beginning of this sentence implies that the rate of change accelerates in the world.</p>