What is feedback in a system? the regulation of a system by the output
the balance of competing factors in a system
the behaviors of the different components of a system
the definition of what is part of the system and what isn’t

An engineer decides to use a slightly weaker material rather than a stronger material, since she knows that the stronger material can break suddenly. this is an example of what? a choosing a material that will show warning before it fails b using composite materials that combine strength c using a material for multiple applications d using design techniques that increase efficiency and reduce cost