Answer:
Answer is d
A weather front is a transition zone between two different air masses at the Earth's surface.
Explanation:
Ultramafic,as components of mafic rocks like olivine and pyroxene solidified at very high temperatures, so mafic minerals will decompose as the result of chemical weathering more rapidly than felsic minerals
The answer is: [A]: "fresh water" .
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<span>It was caused by irregular fluctuations in ocean temperatures, dry climates, and poor farming techniques.</span>
Warm and cold fronts are associated with Low pressure systems!