The four things to look for while proofreading are spelling, grammar, punctuation, and capitalization.
Please mark as brainliest if this helped!
Agricultural systems.
Natural Systems.
Artificial Systems.
Social Systems.
The ad allows the person or person(s) who made it get money, in other words the one who made that ad are paying the person who made the eResource document money to put their ad in it.
answer is B everybody!!!!
