What is tom's initial observation, and what question or problem does it address?

People keep spending additional units of a particular resource on a want until their marginal benefit is  decreasing withgreater thanless thannot affected by  their marginal cost.

When you imagine how you'll get from your house to the store, you are a. mental projection b. mental map c. piagetian projection d. cognitive load

C. how would an erratic boulder provide evidence of the flood? type your response here: i