Frogs dwell in water or in the vicinity of water as

The correct option is "it respires through the skin".

Frogs are amphibians, meaning they are adapted to live both on land and in water. One of the primary reasons they must dwell in water or in highly moist environments (the vicinity of water) is their unique respiratory system.

While adult frogs possess lungs for breathing air on land, their lungs are relatively primitive and inefficient for meeting all of their oxygen demands. To supplement this, frogs rely heavily on cutaneous respiration, which is the exchange of gases (oxygen and carbon dioxide) directly through their skin.

For cutaneous respiration to occur, the frog's skin must remain constantly moist. Dissolved oxygen from the water or moist air dissolves in the thin layer of moisture on the skin and then diffuses into the blood vessels close to the skin's surface. If a frog's skin dries out, it loses the ability to absorb oxygen through its skin, which can lead to suffocation. Therefore, staying in or near water is essential for maintaining the moisture level of their skin required for respiration.