Final answer:
Cholelithiasis, or gallstones, can be caused by several risk factors such as a high-fat diet, high cholesterol levels, obesity, genetics, and certain medical conditions.
Step-by-step explanation:
Cholelithiasis, or gallstones, can be caused by several risk factors. Some of these include a high-fat diet, high cholesterol levels, obesity, and certain medical conditions. Genetics and family history can also play a role in the development of gallstones. Other factors such as estrogen, tobacco smoke, and certain bacteria have been identified as potential risk factors as well.