3 is the answer teeeeeeeeeheeeeeeeee
Water is treated by purifying it by adding slaked lime or potash alum
Answer:
the application of scientific knowledge for practical purposes, especially in industry. Another answer:the sum of techniques,skills,methods and processes used in the production of goods or services or in the accomplishment of objectives, such as scientific investigation
Answer:
A
Explanation:
its A because your comparing so comparative
