Question

fix the one word that is used incorrectly.

you should always site the original source when you include others words or ideas in your papers.

Explanation:

The word "site" is incorrect here. The correct word should be "cite", as "cite" means to quote or refer to (a source of information) in support of an argument or statement, while "site" refers to a location. So we need to replace "site" with "cite".

Answer:

Change "site" to "cite". The corrected sentence is: "You should always cite the original source when you include others’ words or ideas in your papers."