1. which of the following is required to create a computer simulation? a) chronicles b) data c) documents d) files 2. simulations require a) electricity b) input c) memory d) processors 3. which of the following is something that scientists use to determine which variables to include or exclude from a model? a) descriptions b) documentation c) experimentation d) resources 4. which of the following describes one function of a graphics processing unit (gpu)? a) frees up rom b) calculates physics c) explains screen actions d) runs the operating system