Answer:
spelling errors
doubling of words
Step-by-step explanation:
The passage has two words misspelled “introducted” and “relience.” The correct spelling of the first word is “introduced,” which in this context means to bring someone to the attention of something/someone for the first time, and the correct spelling of the second word is “reliance” which means dependence or trust.
Likewise, passage has the error of doubling the words “them” in the following clause: “which helped them them adopt a more tolerant attitude.”