Why is choice fundamental to economic behavior?

choice is a basic fundamental problem of economic,every individual has to make a rational decision to choose between two alternatives because of scarcity of resources,the major problem that made choice exist is because scarcity of resources if for example resources for satisfying human wants are available there will be no need of making any choice.i believe that if choice arises because of scarcity,the major solution is making a choice or arrange your want according to preference and choose the most important one.