According to the theory of island biogeography, which of the following is not an island ecosystem? a. a mountain with thriving vegetation surrounded by an arid desert. b. the open ocean. c. grasslands that surround a lake. d. a cave within the forests of the appalachian mountains in the eastern united states. select the best answer from the choices provided a b c d

The correct answer is B.

the answer is b. it is the only one not surrounded by another environment

idk

explanation:

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.