Final answer:
Kidney stones can be caused by several factors, but low sodium intake is not one of them.
Step-by-step explanation:
Kidney stones can be caused by several factors, but one of the options listed is incorrect. The correct answer is 3) Low sodium intake. Kidney stones are more commonly caused by factors such as dehydration, high calcium intake, and urinary tract infections. Low sodium intake alone does not directly contribute to the formation of kidney stones.