i. What is meant by variability of rainfall ?
ii. How does this variability affect agriculture ?
Give a reason for each of the following :
i. Delhi has rain in December - January.
ii. Kolkata has a little rain in Apri.
i. Name two cities in India which have grown rapidly due to in -migration.
ii. What are the two factors that led to the decreasing growth rate of population from 1981 to 2001 ?
Give reasons for the low sex ratio in India.
i. Preference of male child over female.
ii. The role of education has a great influence on the sex ratio scenario of India. Child marriages are a common part of the Indian society.
iii. Majority of the places in India follow the patriarchal system.In India, males are considered to be the only bread earners.
iv. Due to female foeticide, the sex ratio declines terribly. Maternal mortality also contributes to the declining sex ratio as most of the women die during the childbirth due to improper care and less facilities.
The dependency ratio is higher in rural areas than in UIrban areas. Give two reasons to explain why.
Mention two different ways by which modern methods of irrigation are an improvement over the primitive methods.