2. Context Low frequency behaviour allows upper level to be the context of lower level context is either spatially larger or more constant over time than lower level the fact that summer follows spring sets the context for plant growth that which is constant NB unpredictability can be"constant"and therefore context2. Context - Low frequency behaviour allows upper level to be the context of lower level - context is either spatially larger or more constant over time than lower level : the fact that summer follows spring sets the context for plant growth : that which is constant NB unpredictability can be “constant” and therefore context