Which of the following animals can live for the longest duration without drinking water?

1. A

   Giraffe

   (a) Giraffe. Giraffes drink when they can but do not hold the extreme no-water record among these four.

2. B

   Camel

   (b) Camel. The dromedary is famed for desert travel and fat-hump water economy, yet it still drinks when water is found; it is not the keyed longest faster.

3. C

   Kangaroo

   (c) Kangaroo. Macropods need water more often than the desert kangaroo rat. Australia’s kangaroo is not the key.

4. D

   Kangaroo rat

   (d) Kangaroo rat. Dipodomys of North American deserts can live without free water, making metabolic water from dry seeds. That stored animal is the official key, longer than camel folklore on this list.

Summary. Official key is (d) Kangaroo rat. The desert kangaroo rat survives without drinking. Camel, giraffe and kangaroo are other arid-adapted names, not the stored longest. Neighbouring facts are metabolic water and Dipodomys. Honour the rat.