<span>The answer is letter c. Artificial erosion causes a loss of fertile soil. Natural erosion is considered to be a beneficial process, since it helps create more fertile soil. While an Artificial Erosion causes fertile loss on the soil, artificial erosions causes drastic changes to the whole soil, that causes infertile soil.</span>
The correct answer is D.
From the scientific research conducted so far, we know that in the early Earth's history the atmosphere lacked oxygen and was mostly filled with other gases like methane. The increase in oxygen levels happened when the plants started producing oxygen as a byproduct of the process of photosynthesis.
The research so far also shows that the RNA was present before the DNA and that the microspheres might have been essential to the development of life on Earth.
I believe the answer is B.
Unrelenting exhaustion may be a sign of a condition or an effect of the drugs or therapies used to treat it, such as: Acute liver failure. Anemia. Anxiety disorders.
The correct answer is D. Most flower petals are bright colors in order to attract organisms like bees or hummingbirds for pollination
Hope this helps
