Answer:
is the outermost layer of the atmosphere
I think c. Is right because pollution can contaminate the entire world if we don't work together
The answer is <span>b. water erosion
Water erosion moves water downhill and during this process, different landforms are formed. <u>Some of them are rills, gullies, streams, rivers, tributaries</u>, waterfalls, floodplains, meander, lakes, etc.</span>