The most accurate terms describing the trend over the past 50 years in resource use for human energy and agricultural systems are
a. decreasing and sustainable
b. from unsustainable to sustainable
c. increasing and unsustainable
d. rapidly increasing, moving from unsustainable to sustainablesteady
e. state - no change

ecological efficiency: % of usable energy transferred as

biomass from one trophic level to the next typical is 10% efficient (90% of

energy is lost),is diagramed as the pyramid of energy flow. then osprey eagle

are tertiary consumer and the shrimp are primary consumer, so to balance

mass of shrimp (1/0.1) / 0.1 = 100 kg 

. the sierra madre fault zone of southern california

. the san andreas fault california

what tree

explanation: