Which statement best describes how humans manipulate genetic traits in selective breeding?
A. Doctors insert a correct version of a gene into cells to treat a
disease.
B. Laboratory workers combine pieces of DNA from different
organisms.
C. Scientists produce organisms using genes from more than one
species
D. Farmers choose which organisms they let reproduce based on the
organisms' traits.

D. Farmers choose which organisms they let reproduce based on the organisms' traits

answer; ///the above statement is (true);

answer;

a. sheep consumption efficiency would be reduced.

explanation;

-trophic efficiency is a measure of how much energy occurs at one level divided by the energy at the level immediately below it . trophic efficiency incorporates three types of efficiency:

-the proportion of available energy that is consumed (consumption efficiency).   it is the proportion of the available biomass that is ingested by consumers.

-the proportion of ingested food that is assimilated (assimilation efficiency).

-the proportion of assimilated food that goes into new consumer biomass (production efficiency).

-in this case, the grasshoppers would affect sheep by reducing the proportion of the available biomass that is ingested by the sheep.