Which organ removes waste from the blood and produces urine?

The Kidneys

Explanation:

The kidney filters your blood to pull water, waste, and other things that are beneficial in the blood. The pulled waste; water, bacteria, dead cells, etc. are converted to urine.

Your Kidneys, ureters, and bladder for urine. You have two kidneys that filter your blood, removing wastes and extra water to make urine.

out of the choices i'd say d the ability to set goals, mainly because to desire to continue you need motivation but it isn't motivation in that part, but setting goals means you have an endgame and you want to reach it which sums up motivation.