Which rock has the highest metaphoric grade?
a) rock formed at 500*c and 8 kilobars if pressure
b)rock formed at 1,200*c and 20 kilobars of pressure
c)rock formed at 400*c and 12 kilobars of pressure
d)rock formed at 700*c and 10 kilobars of pressure

C

Explanation:

The most common temperature is 150 -200 *C 400 is the closest

sand 60

clay 10

silt 30

sandy loam should be dominated by the sand. as the amount of sand increased, the amount of slit needed to anchor the plants' roots to the sand will also be increased. even though the amount is very little, 10% part of clay is still necessary for proper oxidation.