The correct matches are Vajrai Waterfall- Urmodi river (Maharashtra), Barehipani Falls- Budhabalanga River (Odisha), Dhuandhar Falls- Narmada (Madhya Pradesh), Kunchikal Falls- Varahi river (Karnataka).
The main reason of the dispersed settlement are Mountainous or heavy forested area, Poor soil fertility, Adverse climatic region, Less availability of arable land.