"<span>They have two germ layers" is the one statement among the choices given in the question that clarifies this. The correct option among all the options that are given in the question is the third option or option "C". I hope that this is the answer that you were looking for and it has come to your desired help.</span>
<span>The central region of the thoracic cavity containing the heart is called the </span>mediastinum. It is enveloped by loose connective tissues. Other than the heart, it also contains the heart's vessels, cardiac nerves, trachea, thoracic duct, and lymph nodes among others located in the central chest area.
I think the answer is A
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Answer:
Fish bones
Explanation:
Most carbons films are left by specimens preserved under a body of water
