What do geologist call an area where there is mostly one kind of topography

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.

Which of the following insects is a decomposer? a. mosquito. b. caterpillar. c. beetle. d. none of the above.

What is the amount of organic matter in all living organisms in a habitat called?