The Corporate Average Fuel Economy (CAFE) was created to require vehicle manufacturers to meet a specific miles-per-gallon (mpg)
standard, on average, for all the different classes of vehicles they produce. Which of these pieces of data would be most useful to
defend the effectiveness of CAFE?
New cars will decrease in price due to better MPG standards.
Over the last 30 years, automobiles in the United States have increased the
average horsepower.
The United States will need to increase the number of barrels of oil
purchased by almost 2 billion.
It is estimated that by increasing the average MPG, it save consumers over
$170 billion dollars in fuel cost.

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:

1)

i))the process of preparing food by green plants in the presence of sunlight is called photosynthesis.

ii) leaf is the site for photosynthesis.

iii) it takes place as,

6h2o+6co2=c6h12o6+602