Final answer:
To increase the concentration of urine, you should consume less salt and take diuretics.b) Consume less salt
Step-by-step explanation:
In order to increase the concentration of your urine, you should consume less salt and take diuretics. Consuming less salt reduces the amount of sodium in the body, which leads to less water being retained and thus more concentrated urine. Diuretics increase urine output by promoting the excretion of water and electrolytes from the body.
On the other hand, drinking more water and consuming caffeine would actually decrease the concentration of urine as they promote water retention and increase urine volume respectively.