The answer is Erosion, which is the the gradual destruction or diminution of something -- in this case, rocks. I hope this helps! For reference/perspective, sand is the product of rock erosion, because it's really just tiny remnants of crushed rock. Those "small pebbles" could be sand, but you'd have to emphasize just how small they are -- one grain of sand is just that: a grain
Answer:
B
Explanation: I took the test
The course of World War II, leading up to the end of 1940, was an
expansion of territory by the country of Germany. Germany was
beginning to invade its neighboring countries. http://www.answers.com/Q/Describe_the_course_of_World_War_2_in_europe_until_the_end_of_1940
The answer I would choose is C.