What is the primary reason for the seasons on the earth (spring, summer, fall, and winter)?

Which of teh following would explain the importance of the trans-siberian railroad to russia's economy? (schoology test)

Can someone answer all these questions i need it done by tonight. once again

Chris lives in a city that experiences heavy rainfall with average annual precipitation of 882 millimeters. it is warm all year.mark lives in city with an average annual rainfall of 40 millimeters. it has hot summers and cool winters.chris's city is in a climate, while mark's city is in a climate.