The rock pocket mouse (Chaetodipus intermedius) is a species of rodent commonly found in the deserts of Mexico and the southwestern United States. Suppose a population of rock pocket mice lives in an area of rocky terrain. The graph below shows the
distribution of body sizes within the population at the time the mice began to live among the rocks.
Number of Individuals
Smaller
Larger
Body Size
Over time, mice with smaller bodies were better able to hide from predators than larger mice. Based on this information, which of
the following graphs shows the most likely distribution of body sizes within the current population of rock pocket mice?

parasites can detrimentally affect their host, but also must not allow their host to die before they can complete their life cycle. some parasites have complex life cycles with many different hosts, and have had to find ways of persisting in many different environments during the change from one host to another. ectoparasites live outside the body of the host, and can more easily  disperse, but are  more exposed to predators, parasites, parasitoids. endoparasites live inside the body of the host, and are therefore protected from the outside environment. but they can be  attacked by the host's immune system. they have therefore developed  mechanisms for dispersal such as  complex life cycles.

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.