Question

the passage below discusses some of the steps of an engineering - design challenge. select the part of the passage that describes optimizing. hint: optimizing is improving a solution, usually by redesigning the prototype. anita and mitch are working on a project for the upcoming science fair. their plan is to design a water filter using only a water bottle and natural materials found in or near a local stream. they make a crude filter by combining rocks and sand in the water bottle. anita and mitch then pour stream water through their filter and analyze this filtered water with a microscope. they find that while the filter removed dirt and pieces of plants, it did not remove all of the bacteria. for their next model, they add a layer of silt to their filter.

Explanation:

Optimizing involves improving a solution by redesigning the prototype. When Anita and Mitch add a layer of silt to their filter after finding that the initial filter did not remove all bacteria, they are improving the design of their water - filter prototype.

Answer:

For their next model, they add a layer of silt to their filter.