What does the author mean by “ symbol “.?

it really depends because they could be doing quotations around like a paragraph. so it depends on what you're asking because if you're asking for the definition then it means a Mark or character by used as a conventional representation of an object function or process it stated in the dictionary if you want to double-check.

i really dont know

explanation:

different strategies reach different people based on their ability to understand the material. (from personal experience) when writing an argumentative essay write explaining the subject as though your audience never heard of it before and it is just being introduced, then explain why other people hate it also, afterward you would explain why that would be wrong. i hope that : )