Does this riddle contour react with itself or not? “with out life there is no death and without death there is no life.”

To keep food safe throughout the flow of food create?

Choose the baroque composers from the list below

Find all the zeros of a quadratic polynomial if 2x quad - 9x cube + 5x square + 3x - 1 if two of its zeroes are 2 + root 3 and 2 - root 3