Final answer:
The left circumflex artery curves to the left around the coronary sulcus and meets with the branches of the right coronary artery, aiding in the supply of blood to the heart's myocardium.
Step-by-step explanation:
The left circumflex artery is the artery that curves to the left around the coronary sulcus, eventually meeting and fusing with small branches of the right coronary artery. Coronary arteries supply blood to the myocardium of the heart. The left circumflex artery arises from the left coronary artery and contributes to the blood supply of the left atrium and ventricle, and the interventricular septum. It has an important role in the coronary circulation by forming anastomoses with the branches of the right coronary artery, ensuring a collateral blood supply to the heart muscle. Thus, the correct answer to the question is the Left circumflex artery.