What causes the difference in seasons between the northern and southern hemispheres?

a. the angle between magnetic and true north
b. the rotation of the earth around its axis
c. the tilt of the earth's axis relative to the sun
d. the movement of the earth around the sun

What is the theme of "the story of the fisherman"?

The diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

Which of the following best describes the purpose of a nation’s boundaries? a. to limit the movement of goods and people b. to make it easier for cartographers to create maps c. to make the movement of goods and people easier d. to prevent other countries from invading territory