Simulation has a lot to do with computer coding, computer games, etc. Due to the use of how much computers are used in this day and age, simulations can be used even for homeschoolers in whom do school online.
They both do the same thing.
Cyber stalking is when someone stalks them on social media sites like facebook. They try to contact you or will even try to find you.
Symbols are important because they facilitate communication and identification of ideas and other concepts based on what those symbols represent