In the Lower Himalayan Mountains, several species of salamander, an amphibian, live in or near a stream. The largest species lives in the stream and along its edges, a smaller species lives on land within a meter or two of the stream, and a smaller species lives about 3-5 meters away from the stream. In this region, these three salamander species are using

• A.  different niches within the same habitat
• B.  the same niche and microhabitat
• C.  the same landscape but different ecosystems
• D.  the same habitat but different niches