Final answer:
Innate immunity is the body's inherent resistance to disease, and the correct answer is 'Natural' immunity. Natural immunity acquired passively includes antibodies transferred from mother to baby. Vaccination triggers artificially acquired active immunity.
Step-by-step explanation:
Innate immunity is the body's inborn resistance to disease. Therefore, the answer to the given question would be 'a) Natural'. Innate immunity consists of various defenses such as physical barriers like skin, chemical barriers like stomach acid, and specific white blood cells designed to recognize and destroy foreign invaders without a previous encounter.
An example of natural immunity acquired passively is the antibodies a baby receives from its mother through the placenta before birth or from breast milk after birth. This type of immunity provides immediate protection without the baby's immune system having to encounter the pathogen.
The type of immunity triggered by vaccination is Artificially acquired active immunity. Vaccines stimulate the body's adaptive immune system to develop memory cells against the pathogen, which provides long-term defense against future infections with the same pathogen without causing the disease itself.