Malena is learning about the water cycle and irrigation. As she designs her irrigation system, which part of water cycle is greatest concern?

Drastic boundary changes can occur for all of the following reasons except for a. a shift in the way a river flows b. the collapse of a government system c. a conflict between two neighboring groups d. one country's decision to sell land to another country select the best answer from the choices provide

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.

Rocks that contain crystals that are roughly equal in size and can be identified with the unaided eye are said to exhibit a texture.