Cell specialization allows new cells to develop into a range of different tissues, all of which work together to make living organisms function as a whole. The process of cell specialization exactly how cells develop into their diverse forms is complex.
The type of muscle found at the heart is the cardiac muscle tissue. This tissue has the phyical striped characteristic of a skeletal muscle tissue and works like a involuntary muscle because it works without our control
This type of tissue is packed wirh mitochondria which provides it with alot of energy. This is very crucial becaise the heart has to constantly beat
Enzymes (Catalysts) lower the required activation energy, allowing the reaction to happen more quickly.
Your answer would be D :)