The skin is the first line of defense in preventing penetration by infectious agents. however, the skin can be bypassed. which of the following scenarios allows an infectious agent to enter the body without damaging the skin? a. a person is infected with malaria when a mosquito bite punctures his skin. b. a girl gets a staph infection when she falls and scrapes her knee. c. a boy is infected with rabies when a dog bites his leg. d. bacteria on food is ingested through the mouth.

sheep is a herbivore animal whereas grasshopper belongs to the class chordates but both of them feed on greens.  

if grasshopper and sheep feeding on a pasture land, i do not think both of them will have any impact on each other. however, the number of the species can make difference. since sheep feed on greens, there is a possibility there left no pasture land for the grasshoppers or they may get extinct.

1. efficient use of space

2. elimination of groundwater contamination

3. energy generation

4. lower carbon footprint