Question

lo 6.1. what are the ureters?
the main arteries that supply blood to the kidneys.
filters in the kidneys that remove waste from the blood.
thin tubes that connect the kidneys to the urinary bladder.
hollow organs in the lower abdomen that store urine.
small sacs that store urine temporarily.

Explanation:

The ureters are thin tubes that connect the kidneys to the urinary bladder. The first option describes renal arteries. The second option refers to nephrons (filters in kidneys). The fourth option is about the urinary bladder (a hollow organ that stores urine). The fifth option is also related to temporary urine - storage structures like the bladder (though not "small sacs" in the context of ureters).

Answer:

Thin tubes that connect the kidneys to the urinary bladder.