Question on English/Writing: Why are certain words in sentences surrounded by brackets? Example: [My cat] was very sleepy.

Wasn’t sure what flair to put this under. Here’s another example I found on an article that inspired me to ask here: “[d]evelopment of ideas and support for claims deepen insight and broaden context...”

Submitted July 15, 2020 at 03:29PM by kiwi_kove https://ift.tt/3jerQ9N