Final answer:
The system that companies and retailers adhere to in order to prevent contamination is called a food safety management system, such as HACCP and GMP.
Step-by-step explanation:
The system that companies and retailers adhere to in order to prevent contamination during processing, packaging, shipping, and shelving is called food safety management system. This system includes practices and guidelines to ensure the safety and quality of food products.
One example of a food safety management system is Hazard Analysis and Critical Control Points (HACCP). HACCP is a preventive approach that identifies potential hazards and establishes critical control points to monitor and control those hazards.
Another example is Good Manufacturing Practices (GMP), which provide guidelines for the proper handling, storage, and processing of food products to minimize the risk of contamination.