Conservation of energy, principle of physics according to which the energy of interacting bodies or particles in a closed system remains constant.

because the reaction, which you are doing is performing in the closed system due to this any other gasses, sunlight and dust particle don't interfere which you have no need of them so this why it remain constant

Explanation:

the correct answer is the letter a

bright white has the greatest comparative advantage as it produces more than double the amount of small tubes than large in an hour.

sparkling comes next as it produces exactly double the amount which is to be expected

fresh comes in third because it only produces 50 more small tubes than large.

the company that shows the least comparative advantage is mmmint as it produces the same amount of small and large tubes.