Summarize how the loss of energy between each level of an energy pyramid affects an ecosystem

Which sentence best expresses the differing opinions of these two book reviews?

Which scientific design has both practical limitations and limitations due to scale? studying the effect of bleach on the growth of mold spores exposing cultures of duckweed to different intensities of light observing the replication of dna molecules with a hand lens using colored marbles to model a cross between two colors of rabbits

Is a measure of the different types of organisms in a community. question options: tertiary secondary primary none of the above