By writing in the third person, you can show both the thoughts of the characters and what is actually happening, allowing the reader to clearly see the difference between opinion and fact and thus include the big picture within the story. If you have a personal connection, such as at home, you can run an antivirus scan on your device to make sure it isn't infected with malware.
Academic writing requires a formal tone and proper grammar, but that doesn't mean you should use five words when one is enough. Keep your wording clear and direct, and don't include any information that is not absolutely necessary to support your argument.
Academic writing is a formal style of writing used in universities and academic publications. You'll find it in journal articles and books on academic topics, and you're expected to write your essays, research papers, and dissertation in an academic style.