QUESTION: Fix punctuation: In 1884 he began to study the effect which magnetization exerts on the polarization of reflected light
ANS: In 1884 he began to study the effect which magnetization exerts on the polarization of reflected light.
QUES: Did someone email you a U3I file and youre not sure how to open it Maybe you have found a U3I file on your computer and wondering what its for Windows might tell you that you cant open it or in the worst case you might encounter a U3I file related error message

correct the punctuation.

CORRECTED: Did someone email you a U3I file and you're not sure how to open it? Maybe you have found a U3I file on your computer and wondering what it's for? Windows might tell you that you can't open it, or in the worst case, you might encounter a U3I file related error message.
Question: what is it that you excel at and love doing
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Answer: what is it that you excel at and love doing?
The chart above indicates that about half of all SCORM 2004 courses use some form of deliberate sequencing strategy

Can you repeat this sentence, but add in punctuation?
The chart above indicates that about half of all SCORM 2004 courses use some form of deliberate sequencing strategy .
input: May have sudden acute onset due to a known traumatic event
fixed: May have sudden (acute) onset due to a known traumatic event
The red sandstone building with its 133foot spire side aisles and clerestory windows is designed in an English Country Church style

Can you repeat this sentence, but add in punctuation?
The red sandstone building with its 133-foot spire, side aisles, and clerestory windows, is designed in an English Country Church style.