Final answer:
Mucosa-associated lymphatic tissue (MALT) includes tissues like tonsils, which are associated with the mucous membranes and are part of the immune response to pathogens.
Step-by-step explanation:
Mucosa-associated lymphatic tissue (MALT) includes various lymphoid tissues that are associated with the mucous membranes throughout the body. Among the tissues classified as MALT, the tonsils are a well-known example, which are located in the throat and play a role in the immune response to inhaled or ingested pathogens. Other examples of MALT include Peyer's patches located in the small intestine, which are important for immune responses against ingested substances, and bronchus-associated lymphoid tissue (BALT), which is found in the respiratory tract. Therefore, the answer to the question is D. tonsils.