Which of the following animals can exist solely on the water they get from food ...

This Biology question is asking which animal can survive only on the water they receive from their food and metabolic reactions. The options are forest arboreal dwellers, desert dwellers (which is the correct answer), forest-ground dwellers, and rainforest dwellers.

Desert dwellers, such as camels, are able to survive in the harsh desert environment because they have adapted to conserve water. They get all the water they need from the food they eat and from metabolic reactions, which means they don't need to drink water separately.

Forest arboreal dwellers are animals that live in trees, such as monkeys and sloths, and they typically get their water from rain or dew that collects on leaves.

Forest-ground dwellers are animals that live on the forest floor, such as deer and rabbits, and they obtain water from sources such as streams, rivers, and ponds.

Rainforest dwellers are animals that live in the dense vegetation of the rainforest, and they typically get their water from the abundant rainfall in the region.

Therefore, the correct answer to this question is desert dwellers, as they are able to survive solely on the water they get from food and metabolic reactions.