Final answer:
Bacterial spores are the most resistant to physical and chemical agents, followed by fungi, then non-enveloped viruses, with enveloped viruses being the least resistant.
Step-by-step explanation:
When listing organisms from most to least resistant against physical and chemical agents, we must consider the robust nature of bacterial spores, the moderate resilience of fungi and non-enveloped viruses, and the relatively lower resistance of enveloped viruses.
Bacterial spores are known for their high resistance to extreme conditions and can survive for long periods in harsh environments due to their ability to protect their genetic material within a tough protective covering. Fungi have cell structures similar to human cells, which makes them more challenging to target without affecting human tissue. However, they are less resistant than bacterial spores. Non-enveloped viruses do not have a lipid envelope and are thus more resilient to disinfectants compared to enveloped viruses, which have a lipid layer that can be disrupted by many physical and chemical agents, making them the least resistant.
Therefore, the correct order from most to least resistant is: a) Bacterial spores, fungi, non-enveloped viruses, enveloped viruses