Answer:
Is this a question about the topic of biology
<span>Is the study of humankind in all times and places.
-the study of all humans throughout time and space. Hope it helped!</span>
Answer:
the awnser is the loss of water resources in estuaries
When you swallow food, it doesn't just drop down into your stomach. Muscles contract in a wave-like motion to move the food along through the esophagus. This muscle movement is called, peristalsis, or peristaltic waves. These peristaltic waves contract behind the food bolus pushing it along the digestive tract.