They only tested two to have a solid hypothesis you need a larger group.
The correct answer is option C) A wet spring before vegetation is growing. A lack of roots holding soils and sediments together and an over-abundance of water can result in mass movements.
The expirement is saying show the circle of water
1.the water mocules move apart so it is a gas
2. when the water mocules build up in the cloud and the water relese
3. the rain freezes then meltes and starts all over to 1
C. The nervous system sends signals to make muscles move.