1. A system is a group of objects analyzed as one unit.
2. Energy that moves across system boundaries is conserved.
3. There’s only one way to define the boundaries of a system.
4. All systems are made by humans.
The answer is A because a system is actually made up of different parts working together as one unit. A phone is an example of a system because it is made up of parts that work together such as the processer and graphics card.
