Whenever there is a change of state, such as a solid to liquid or liquid to gas, heat energy can be added without a temperature change because
a) the added energy is not needed.
b) the energy is lost to the system.
c) the change of state requires energy.
d) the energy is lost to the atmosphere.

i believe it is-

d.) gravity pulled particles of dust and gas together to form planets.

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.

16

explanation:

the marks go by 4s