1. a vibration of an electric charge. 2.transmits energy from the sun to earth 3. a wave which has both an electric and a magnetic component 4. the speed of this wave decreases as the medium becomes denser. what type of wave is being described by the statements above?

1. a tropical dry forest carries out more rapid nutrient cycling

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.

bacterium is not correct

i think it is d. objects resist changes in their state of motion.