What is system input? a. feedback from scientists about the results of a system b. the ordered processes that the system uses to change raw material c. material that has been changed by a system d. raw material that must be put into a system for processing

The graph indicates the running route for tobias. which best describes his run? from time 0 to 6, he went fast and then slowed down. from time 6 to 10, he was at his slowest. from time 12 to 14, he went very slow. from time 14 to 18, he went toward the starting point.