Sometimes you mix different substances and you don't make new substances but mostly of the time you do make new substances , so the answer is chemical change.
Answer:
nitrogen fixation is the answer
An environmental group claims that a local chemical plant is polluting a nearby river. They are calling for a shutdown of the chemical plant. The evidence that would help you the most in evaluating the claim would be (A) a repeated study that shows chemicals produced by the plant are in water harming fish or other wild life. (The answer is A.)
<span>The experiment
performed by Francesco Redi supports the hypothesis that fly larvae only come
from adult flies based on his experiment design using a covered-meat and
non-covered meat. In addition, he also believed that maggots came from the fly
rather than from the rotten meat by using the same experiment design. </span>
B. It increases a change away from a set point
