भारत की 2011 की जनगणना के अंतिम आंकड़ों के अनुसार, देश में जनसंख्या का औसत घनत्व कितना है?

Crude birth rate is defined as the number of live births per 1,000 population in:

Many developing countries experience continued population growth despite a decline in fertility rates due to which of the following factors? (a) Increase in life expectancy (b) Increase in infant mortality rate (c) Falling death rate (d) Better living conditions