Study the graph about seismic waves. Graph of P & S Wave Travel Times, showing Travel time in minutes across distance in kilometers for P and S waves. S wave starts at zero kilometers, zero minutes, and increases to 10,000 kilometers, 25 minutes. P wave starts at zero kilometers, zero minutes and increases to 10,000 kilometers, 13 minutes.

What does the graph show?

The S and P waves travel the same distance through Earth’s crust in the same amount of time.
The P wave travels through Earth’s crust more quickly than the S wave travels.
It takes the P wave 18 minutes to travel 6,000 km through Earth’s crust.
It takes the S wave 11 minutes to travel 8,000 km through Earth’s crust.

The Answer is B.

"The P wave travels through Earth's Crust more quickly than the S wave travels"

Explanation:

Did it on Edge.

Real explanation: In the graph, you can see that the P wave traveled to 10,000 km in about 12-13 minutes, while the S wave traveled to 10,000 km in 25 minutes.

Hope this helps

B) The P wave travels through Earth’s crust more quickly than the S wave travels.

Explanation:

1) gene flow

- it is described as the transfer of genes from one population to another population so that frequency of gene is increased.

-a zebra migrates to join a different herd of zebras.

2) natural selection

- a mechanism of evolutionary change in which individuals with advantageous traits survive and reproduce whereas the others ( those that can not adapt) eliminate from the population.

-competition for sunlight leads to taller trees.

3) mutation

- permanent change in the nucleotide sequence of dna ( genetic material) that could have harmful or useful consequences.

-the dna of a snake changes to make its venom stronger.

4) genetic drift - it is a random phenomenon ( that occurs by chance such as fire) that results in change in the gene frequency in a small population.    

-a grassfire randomly sweeps through a population of buffalo and kills most of the animals.

explanation:

i think it is dna, i'm not totally sure but i think it might be.