Ascientific law is
a. a universally accepted conclusion based on testing
b. always changing as a new evidence is presented
c. based on new evolving theories
d. often debated in the scientific community
e. one step toward forming a theory

The answer is A.

Scientific laws may be revised sometimes, but aren't changed when new evidence is found. They do not evolve from scientific theories and theories don't evolve to laws. So it must be A.

the ozone layer acts as a filter for the shorter wavelength and highly hazardous ultraviolet radiation (uvr) from the sun, protecting life on earth from its potentially harmful effects. when the sky is clear, there is an inverse relationship between stratospheric ozone and solar uvr measured at the earth's surface.