The Harappan Civilization used the Lost Wax Process, also known as the \textit{cire-perdue} method, for making bronze figurines. This technique involves creating a wax model, covering it with clay, heating it to remove the wax, and then pouring molten metal into the mold. One of the most famous examples of this technique is the Dancing Girl figurine found at Mohenjo-Daro.
Thus, the correct answer is Lost Wax Process.