Answer 1

Increase in demand and increase in quantity demanded of a good

Increase in quantity demanded	Increase in demand
It refers to quantity demanded changes due to change in the price remaining other factors constant.	It refers to a rise in demand for a commodity because of factors other than the price.
Factors which cause the increase in quantity demanded An increase or a decrease in the price of the given commodity	Factors which cause the increase in demand Increase in income of the consumer The rise in the price of the substitute good Fall in price of complementary good Change in taste and preferences in favour of the good
It leads to a movement along the same demand curve either upwards or downwards	It leads to shifts in the demand curve either rightwards or leftwards.