7. What causes high and low tides?
O A. The series of regular lunar eclipses
O B. The frictional coefficient of water
O C. The gravitational pull of the sun and the moon
O D. The rotation of the earth on its axis
The moon and sun have their own gravitational pulls that indeed cause high and low tides. If you can see the moon over you at a beach for say, then the tides would be high, if there is no moon, then the tides are low
