Final answer:
The superior, superficial muscle of the calf is the gastrocnemius muscle. It is the most visible and contributes to the form of the calf, differentiating it from the soleus, tibialis anterior, and the quadriceps which are not superficial calf muscles.
Step-by-step explanation:
The superior, superficial muscle of the calf that is being asked about in the question is the gastrocnemius muscle. This muscle, along with the soleus and plantaris, inserts onto the calcaneal tendon, commonly known as the Achilles tendon. The gastrocnemius is the most visible and superficial of these, making it the correct answer to the question.
Furthermore, when considering which muscle is the largest in the lower leg, the correct choice would be the gastrocnemius. Even though the soleus is substantial in size and plays a significant role in plantar flexion, the gastrocnemius is the most prominent superficial muscle in the calf.