Question

Define poverty line why does the poverty line vary with time and place

Answer 1

a person don't have is basic needs or who don't have ability to fulfill is daily basic needs is defined as poverty line

Answer 2

'Poverty line may vary with time and place' .   A person is considered poor if the income or consumption level of a person falls below a given minimum level necessary to fulfil basic needs. Basic needs are different at different countries and different time. That is why, poverty line may vary with time and place.