B. Equals
For a chemical equation to be balanced the number of each type of atom must stay the same.
"I" is in regards to yourself, you and any humans name are proper nouns that you go by. "a" is not a proper noun it is describing the quantity or the subject of the matter, Ex- [I] love it when [a] cool summer day takes place in my area.
{Bad sentence, sorry}
Change of tone. You can change the tone of your voice to make the story more compelling
