Savollar kitobi abituriyent

The author discusses this issue in order to explain... .

1. 
   the distance between the Earth and the Sun
   
2. 
   the way in which the Earth goes around the Sun
   
3. 
   why the weather is different in different parts of the Earth
   
4. 
   why sun-rays are parallel when they reach the Earth
   

107. 
     It can be inferred from the passage that... .
     

1. 
   summer is when the Earth is closest to the Sun
   
2. 
   when it is summer in the northern hemisphere it is winter in the southern hemisphere
   
3. 
   temperate regions are cooler than equatorial regions as sun-rays travel through more atmosphere to reach them
   
4. 
   sun-rays lose heat in passing through space
   

108. 
     According to the passage the angle at which the sun’s rays strike the surface of the Earth is determined by ... .
     

1.