Selma made an error while creating a chart to describe the technological design process for a new vacuum. Which best describes how Selma can correct the error in her chart? Change “Identify a need” to “Identify a problem.” Switch the descriptions for “Identify a need” and “Evaluate the solution.” Change “Implement the solution” to “Test the prototype.” Switch the stages “Evaluate the solution” and “Design a solution.”

15. which of the following is not human-caused groundwater pollution? a. water in an aquifer dissolves elements such as arsenic and mercury from surrounding rock. b. water in an aquifer is contaminated by leachate that seeps into the ground from a landfill. c. water in an aquifer becomes polluted with chemicals used in hydraulic fracturing, or fracking. d. water in an aquifer absorbs harmful bacteria from the drainage field of a septic tank.