<span>In the written directions the indicator that the matter contains protein is when the solution turns a purple color. Therefore we can conclude that if your sample causes the solution of Copper Sulfate and Sodium Hydroxide to turn purple, it does indeed contain protein.</span>
Read what you've been given...... If there's protein, then the solution turns PURPLE. The answer is right there with statement #3. To quote: 3. If the solution turns purple, the food contains protein.
Water is a human necessity. Therefore, it is one of the first things a human settlement would need to have. A community cannot thrive without a water source.
