What type of mountain is the most rare

they each offer a fresh glut of resources to the organisms that can arrive and exploit them. as individuals and new species continue to appear, they actively and passively alter the environment. competition for shared resources increases, local abiotic and biotic conditions shift, and the relative abundances of species change accordingly. the process is called ecological succession, and it is one of the earliest and most well-known concepts in ecology.

thinking it would be physical characteristics

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link: