The texture of sedimentary rocks, like the size of grains or chemical precipitates can show how the rock was formed. The fossils of sedimentary rocks can show when the rock was formed. The stratification and sorting of the particles can show were the rock was formed.
B: China and India both have a population around 1.5 billion people so in total they have around 3 billion people combined! That is more than the continent of Africa and North America combined!
