Mendeleev organized the elements
a. alphabetically by name.
b. by the number of electrons.
c. by increasing the atomic number and similar properties.
d. by increasing atomic weight and similar properties.

D

Explanation:

Mendeleev was a Russian scientist. His works provided the framework for the present day periodic table. What Mendeleev did was to arrange the elements in order of their atomic weights.

He however had some gaps in his periodic table. He impressively predicted the elements that would fill in these blank spaces even though they were yet to be discovered as at then.

i believe it is a.) released into

explanation:

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.