What is poverty? which is biggest challenge for poor people?

Poverty is a state of life, affecting all of humanity. Poverty is most commonly defined by economic standards, based on income levels and access to basic human necessities, such as food, water, and shelter. Poverty is often described with a scale, ranging from extreme to moderate levels. Its really hard to be poor and living on be streets because you don't what your gonna eat the next day and where your gonna sleep.