Q AQ What type of system is required to maintain the amount of sugar in the blood at a certain level, making sure it does not rise too high or fall too low?

A. one negative and one positive feedback loop
B. two negative feedback loops
C. two positive feedback loops
D. one negative feedback loop

i dont know

Explanation:

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.

b. read the phase at the intersection of any given temperature and pressure.