The tilt of the earth’s axis of rotation changes from approximately 22.5° to 24.5° over a period of 41,000 years. this causes global climate change. when the tilt is small there
a) less difference in gravitational pull in the middle and high latitudes
b) less climatic variation between the summer and winter seasons in the middle and high latitudes
c) greater difference in solar energy received at the earth's closest and farthest locations from the sun
d) greater difference in duration of days and nights at the earth's closest and farthest locations from the sun