Read the Passage and answer the following Question. 
There is an uneven spatial distribution of population in India which suggests a close relationship between population and physical, socio-economic and historical factors. As far as the physical factors are concerned, it is clear that climate along with terrain and availability of water largely determines the pattern of the population distribution.

Which of the following areas were earlier very thinly populated area but now have become moderate to high concentration of population due to availability of mineral and energy resources?

Parts of Jharkhand.

The correct answer is Option 3: Parts of Jharkhand.

Areas of Jharkhand were earlier thinly populated because of dense forests and difficult terrain. However, the discovery and development of rich mineral and energy resources such as coal, iron ore and mica led to industrial growth and urbanisation, resulting in moderate to high concentration of population.

Areas in Rajasthan have developed due to irrigation.

Bihar has historically been a densely populated region because of fertile plains, agriculture and river systems. It was not “earlier very thinly populated.”

NCERT: Development of irrigation in Rajasthan, availability of mineral and energy resources (Jharkhand) and development of transport network (Peninsular States) have resulted in moderate to high concentration of population in areas which were previously very thinly populated.