I’m pretty sure it’s an embryo
.............The answer is D
Organs that are not part of the gastrointestinal tract are the liver, gallbladder, pancreas, etc.
The<em> gastrointestinal tract</em>, which is also called the <em>alimentary canal</em>, is the pathway by which food enters the body and solid wastes are expelled.
The organs in the gastrointestinal tract include the mouth, pharynx, esophagus, stomach, small intestine, large intestine, rectum, and anus.
Examples of organs that are not part of the gastrointestinal tract are the liver, gallbladder, pancreas, etc.
Learn more here: brainly.com/question/15864680
Energy flows through an ecosystem through the food chains. smaller bugs are eaten by bigger bugs and bigger bugs are eaten by animals. etc. energy flows through each organism and light!
The answer is source B because it has a listed author who is an expert and it is the governments organization website which are more reliable that a .com website. Source A does not even list the author so you do not know who wrote it could be anyone.