Answer:
The answer is the Immune system (a).
Explanation:
The immune system consists of agents that help your body fight against pathogens and other invading substances. It has your white blood cells, enzymes, mucus, hydrochloric acid (in your stomach), and even your saliva. All these substances help make sure your body is rid of anything that may bring harm to you!
Fire extinguisher, smoker detector, and garbage can
Hereditary Diseases are passed on from one generation to another through defective genes. These diseases are transmitted in the same family. The chromosomes in the humans are responsible for passing the traits from the parent to the offspring.
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