<span>The esophagus runs behind the windpipe (trachea) and heart</span>
Viruses<span> are much, much smaller than </span>prokaryotes<span>. </span>Prokaryotic<span> and </span>Eukaryotic cells<span>are both alive, while </span>viruses<span> are not. </span>Viruses<span> have very few organelles, similar to the</span>prokaryotic cells<span>. They contain a plasma membrane, </span>cell<span> wall, RNA or DNA, and a protein capsule.</span>
Answer: B
Explanation: The other answers are talking about similarities among different species.
The answer is C. lack of competition.
hope that helps
