The en dash is for little connections (like “pre-WWI” or “pages 175-176”), while an em dash shows longer breaks, such as interruptions in a sentence. True
False

True.

Explanation:

En dashes (-) are shorter than em ones. They have the length of an N. We use them to indicate periods, to connect words, or to indicate periods or a set of numbers, like in the example "pages 175-176".

Em dashes (—) have the length of the letter M. We use them to add information as if they were brackets, as commas to introduce a clarification in a sentence, and lastly to show that an action is interrupted.

what is the sentence?