B. Is the correct answer.
Diaphragm...is the muscle that helps in respiration.....there are also some other but....you said flat so diaphragm !
A polymer is a large molecule made up of many ____. The four categories of biological macromolecules are ___, ___, ___, and ___. carbohydrates, proteins,lipids, and nucleic acids, The type of macromolecule that is used primarily as a source of energy is ___.
Muscles - they are meat, and animals will eat the meat. They also decompose, leaving no trace of the remains.
The mechanism of enzymatic action within a single substance
