D. He showed how traits are passed between generations
<span>The skin is the largest organ of the body, </span><span>area of about 20 square feet
</span><span>The skin protects us from microbes and the elements, helps regulate body temperature, and permits the sensations of touch heat and cold.</span>
The answer is Barchanoid Dunes.
Best of luck,
The Artemis Wolf
C is the answer just did it
