What type of immunity is acquired as a result of developing the disease?

The correct answer is that the type of immunity acquired as a result of developing the disease is naturally acquired active immunity. This immunity occurs when an individual's immune system responds to a pathogen after being infected. During this process, the body produces antibodies and memory cells that provide long-lasting protection against future infections from the same pathogen.

When someone contracts a disease, their immune system actively engages with the pathogen, recognizing and remembering it. This active engagement leads to the development of specific defenses, such as antibodies that will be mobilized if the pathogen re-enters the body. This is why this form of immunity is termed "active" – the individual's immune response is stimulated directly by the pathogen.

In contrast, other types of immunity presented in the options refer to different mechanisms of acquiring protection. For example, naturally acquired passive immunity involves the transfer of antibodies from one individual to another (such as from mother to infant through breast milk) without the recipient's immune system actively engaging with the pathogen. Artificially acquired active immunity involves vaccination, where a harmless form of the pathogen is introduced to stimulate an immune response without causing the disease itself. Meanwhile, artificially acquired passive immunity involves the transfer of antibodies (like serum or immunoglobulin injections) from another individual or animal, which does