According to the frontier ethic, saving endangered animal species may be considered foolish because . new species will take their place extinctions occur as a natural process animals serve no human purpose animals cannot be controlled

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.