How do magnetic stripes of iron in ocean rock provide evidence of seafloor spreading? a. They show when Earth's poles reversed.
b. They show how the density of the seafloor has changed.
c. They reveal a matching pattern on either side of the ridge.
d. They reveal differences in the mineral composition of newly created rock.

meteorologists would compare a new weather map with one 24 h old to see how fast a front is moving.

i need an image of the diagram

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.

i think the answer would be d