Final answer:
The correct answer is option A) Test foods and use a living filter.
Step-by-step explanation:
At Penn State's Sensory Evaluation Center, you can test foods and experience the unique feature of their Wastewater Treatment Plant, which utilizes a living filter. This innovative system integrates natural processes to treat and purify wastewater before releasing it back into the environment. Answering the second part of your question, there are indeed engineering fields focused on water purification, including desalination. Chemical engineers are typically involved in this process, designing and building large-scale processing plants for the production of purified water, among other products.
Desalination techniques such as flash evaporation and reverse osmosis are essential methods used today. Flash evaporation involves the evaporation and condensation of water, while reverse osmosis uses molecular membrane technology. A notable example of such a desalination plant is the nuclear-driven flash evaporation facility located on the Caspian Sea.