A student wants to determine the effect of soil type on plant growth. He sets up three pots as shown below. How could this experiment be improved?

B

Explanation:

B is the correct answer. This ensures that all other conditions remain constant and therefore ensures that it really is the effect of soil types that you're testing.

Hope this helps!!! :)

hi, natural selection of the peppered moth during the industrial revolution in 19th-century england is an example of an outlier in the study of evolution. during this time, pollution from factories filled the forests, coating trees in a layer of soot—turning white trees black

mark as brainlest

gokuson

c is the answer : )               your welcome