Rocks are made of minerals, and they are formed in different ways. According to the diagram above, how are sedimentary rocks formed? A. Sand and other particles are buried, compacted, and cemented together. B. Wastes deposited by plants and animals decompose and weather. C. Molten rock cools and turns solid. D. Other rocks experience intense heat and pressure.

The correct answer is  "c".  it is "c" because melting is an endothermic change, and endothermic get's energy from surroundings. 

Answertraveling around a circular trackexplanation"traveling around a circular track" is the best answer as you could be traveling around a circular track at a constant speed. your velocity would therefore have the same magnitude but will always be constantly direction. since acceleration is the rate of change of velocity, the rate of change will only involve the direction of velocity and not the magnitude.wrong choices: "an object at rest" does not accelerate at all"increasing speed while traveling around a curve" means that the acceleration will not be constant due to only change in direction; it will be constant due to both magnitude and direction"an object in free fall" does not necessarily change direction