We never need to use a forward declaration when invoking a public subprogram. true or false?

Ergonomics is the study in which of the necessities of designing and arranging the things that people use regularly. It teaches people/students how to use tools/objects/living spaces in the most efficient ways. It introduces people to have better posture such as sitting in a chair, how to focus on having a firm tight grip on a tool, and more accessible to the most effective equipment to which they may use on the average daily. Appropriate seating should adjustify the way the seat back is structured/angled, so that students will feel more comfortable and obligated to focus on their study and completing their tasks without discomfort. The workplace should be comforting for the student to feel that they can use their study skills to work in such an environment. Such as, a stable work surface with a negative slope keybord so that their elbows can have over a 90 degree angle space and a gliding mouse on the surface closest to the side of the individuals body, that way the student would not have to reach over to the side constantly. This, is why ergonomics is important and can improve a students ability to focus with all the right materials and comfort they need to remain focused.