___________________ viruses change the code order of the strain each time they replicate to another machine.

Malicious is a general term describing the intent of a virus but does not describe its specific replication characteristic of changing code order.

Zenomorphic is not a recognized term for a type of computer virus.

A worm is a type of malware that self-replicates and spreads across networks, but the term itself doesn't specifically describe the code-changing behavior upon replication.

Super is not a recognized term for a type of computer virus that changes its code order during replication.

Polymorphic viruses are a type of malware specifically designed to evade detection by security software. They achieve this by modifying their own code, changing their signature or structure, with each new infection, while maintaining their original functionality, making them difficult to detect through signature-based scanning.