The topmost layer of the earth (aside from the atmospher) would be the crust. It is made up of tectonic plates that move in different directions. The collisons and abrasions made by these plates sliding and crashing into each other means that mountain ranges pop up like wrinkles, and continents can move around over time. This happens over millions of years.
good luck !
The correct answer is: [B]: "sludge" .
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Answer:
D. A substance, energy source, or organism used by humans
Explanation:
Its not man made like the others
a drop of water may spend over 3,000 years in the ocean before moving on to another part of the water cycle
