The correct answer is D, Hope that helps! :)
It's called peristalsis. It occurs through the oesophagus all the way through the digestive tract.
I'm going to say be because different malls can't survive in different environments
<span>Schizophrenia
This is a mental disorder characterised by failure to understand what is real and abnormal social behaviour .
Studies across 20 countries have shown a strong link between smoking and schizophrenia .</span>
