Hummingbirds have a beak just the right length to reach the nectar in a cardinal flower and as they feed, they touch the pollen structure, transferring pollen from one flower to another.

Coevolution, Convergent Evolution, or Divergent Evolution?

I believe the correct answer would be Coevolution.

The definition of coevolution is "Two or more species evolving together" and as the hummingbird and flower influence one another I believe that would be the perfect example of coevolution.

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.