Which of the following combinations can be regarded as sub-systems within the ecosystem?
-
A.
food chain, hydrological cycle, mineral nutrient cycle -
B.
hydrogical cycle, mineral nutrient cycle, evironmental controls -
C.
Mineral nutrient cycle, hygrological cycle, ecosystem controls -
D.
Ecosystem controls, food chain, hydrological cycle -
E.
Food chain, ecosystem controls, environmental controls