Costa Rica is surrounded by the Pacific Ocean and the Caribbean Sea. It also borders the Gulf of Nicoya.
C. <span>The duodenum is a separate anatomic structure. It is the first part of the small intestine after the stomach. </span>
<span>which some organisms have learned to harness energy from sources other than the sun, including geothermal energy. That heat energy allows them to form energetic molecules of their own.</span>