Final answer:
The palatine tonsils are the most likely to become infected as they are composed of lymphoid tissue and trap and destroy pathogens entering the body through the oral or nasal cavities.
Step-by-step explanation:
The most likely to become infected are the palatine tonsils. The palatine tonsils are located on each side of the pharynx, in the area of the fauces. They are composed of lymphoid tissue and trap and destroy pathogens that enter the body through the oral or nasal cavities.