The graph provided presents information on changes in the populations of a predator and its prey over time. Which of the following best explains the increases and decreases in the predator population?

A. A There were variations in the food supply.
B. B Predators migrate frequently.
C. C The paramecium competed with the yeast.
D. D Populations always achieve a stable level.

A.  There were variations in the food supply.

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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.

brain development. a child's brain undergoes an amazing period of development from birth to three—producing more than a million neural connections each second. the development of the brain is influenced by many factors, including a child's relationships, experiences and environment.

explanation: