Eddie's assignment is to prepare a dichotomous key for several objects. his first task was to arrange the objects. the objects are a lighting bug, a butterfly, a ladybug, and ant, and a canary. while organizing the objects, eddie considered several options and found that the most general categories should be listed first. what should eddie use first to divide the organisms into two groups?

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 

weathering - colorado river carves land in arizona to form the grand canyon. cracks form in a sandstone wall surrounding a house. a marble statue near the science museum is changing color due to rainfall

erosion - after a rainstorm, soil and rock piees litter the roadways. the sand dunes in the sahara desert are changing shape.

here's your answer.