2 one point in time, this cliff was solid rook There was little else here. Over time, lichens have chemically altered the surface and soil has begun to form Before that happened the solid rock was physically weathered and broken inte smaller pieces by what
agent
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water and wave action
alternate freeting and thawing
acid rain reacting with carbonate

All of the following are part of the biosphere except

Which ocean zone has the most abundant primary producer and why a) the abyssopelagic zone ,du to the absence of light and cold water temperatureb) the bathypelagic zone, due to the absence of light and cold water temperaturec) the mesopelagic zone ,due to uts high light availability and warm water temperature d) the epipelagic zone,due to its high light availability and warm water temperature

About 3% of the water on earth is freshest. only about 40% of that freshwater is available for human use. why is so much freshwater unavailable for human use?