4..........................
The answer is "none of the above".
The smooth muscle is responsible for movement of food by peristalsis and mechanical digestion by segmentation.
Im really good at crosswords, e-mail a copy & i’ll fill it out for you
I believe the answer would be Ecology which is the study of organisms and their relations
An example of an acquired trait is <span>larger </span>muscle size<span> from exercise or from avoiding predators. hope this helps, have an amazing day :)</span>