Question

what is subsistence crises? what are its causes

Answer 1

A subsistence crisis is a crisis caused by economic factors (generally high food prices), which in turn may be caused by either natural or man-made factors, which threatens the food supplies and the survival prospects of large numbers of people (it is considered famine if it is extremely severe and large numbers of 

Answer 2

When livelihood of people are in danger is referred to subsistence crisis.