When we use words and sentences to communicate, we follow rules that govern how we put words together. These rules are called

Syntax

Explanation:

Syntax refers to the rules that govern how words are put together (especially word order) in a sentence to convey meaning

answer:

i havent taken the psat, but i have the sat, make sure to bring some snacks, because youre in there forever, 2 sharp number two pencils, an sat approved calculator, and maybe a jacket.   your phone and any books will be taken up, so don't try to bring them(but they will be given back at the end of the testing).   good luck!   i hope you do well!