Is rounded and found with running water
The answer is D. Gravity.
Gravity attracts objects to the surface of the Earth. Take a falling brick, for example, the brick has more mass, therefore, there is more attraction between the brick and Gravity. The brick is a solid object and is heavier as well.
Hope this helps! :)
The answer is that Karachi is in Pakistan and Dhaka is the capital of Bangladesh. That makes the answer A.
