A diagram in the course handout shows that a patient develops amoebiasis after consuming unsafe water in an area with poor sanitation. Identify the related structure or process.

Entamoeba histolytica is usually transmitted by ingestion of cysts in contaminated food or water. Sanitation and safe drinking water are key preventive measures. This MCQ belongs to the Medical importance topic in Animal Diversity-I and is written to test concept understanding rather than memorized wording.