Can someone me with this but give details ? (it's a physics class)

True or false: the cycle of seasons on the earth is caused by the tilt of the earth on its axis toward and away from the sun.

An athlete is holding 24 lb of weights at a height of 6 inches above the stack as shown. to lower the weights, she applies a constant force of 5 lb to the handle. determine the velocity of the weights immediately before they hit the stack.

In which of these cases are the two wave points considered to be in phase with each other?