Which of the following organism breathes through its skin?

Frog

The correct answer is Option (4) –Frog

The organism that breathes through its skin among the options provided is: Frog

Frogs are amphibians that possess a moist, permeable skin which allows them to exchange gases (such as oxygen and carbon dioxide) directly with their environment. This process, known as cutaneous respiration, supplements their breathing through lungs. While frogs primarily respire through their lungs, they can also absorb oxygen through their skin, especially when submerged in water or in damp environments. This adaptation enables them to respire efficiently in aquatic and terrestrial habitats.

The other options, monkeys, cows, and dogs, are mammals that primarily respire through their lungs and do not rely on cutaneous respiration to the same extent as amphibians like frogs.