which of the following best describes the effects of revolution of the earth? Select one: a. causes four seasons, varying lenghths of day and night , lunar eclipse and changes in position of the midday sun at different times of the year. b. causes seasons ,varying lengths of day and night, eclipse and changes in position of the midday sun at different times of the year c. causes solar eclipse , four seasons and varying lengths of days and nights and changes in the position of the sun at different times of the year