1.Which of the following is the best example of motion?A. Waving your armsB. Tossing and turning in your bedC. Walking from home to schoolD. Your dog wagging his tail

Year  1936,  lehman predicted that the earths 'inner core' is solid. she observed that the seismic signals during her study were bent and did not pass through instead bouncing back. later it was confirmed that the earth's inner core was solid made up of nickel-iron and had a molten outer core.

The answer would be d. hope this : ))