The diagram indicates that the tilt of Earth's axis and Earth's revolution around the Sun cause Earth to experience ?

G day and night ma g

Explanation:

The figure is representing the motion of revolution of the Earth around the Sun.

This motion lasts approximately 365 days (one year). Since the axis of rotation of the Earth is tilted (by about 23 degrees from the vertical), the amount of light received by different parts of the Earth at the different part of the year is different.

In fact, we observe 4 "extreme" cases:

- Situation at the bottom: here the situation is symmetrical in the two hemispheres, which receive an equal amount of light. So, we have 12 hours of daylight and 12 hours of dark at every point on Earth - this is called

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.

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.