Final answer:
A moral imperative that is based on desire is known as a Hypothetical Imperative, which is an action taken to achieve a particular goal and fulfill a desire.
Step-by-step explanation:
A moral imperative based on desire is called a Hypothetical Imperative. This term stems from the work of philosopher Immanuel Kant, who distinguished between categorical and hypothetical imperatives in his ethical theory. A hypothetical imperative is about actions that serve a specific end or goal, such as 'study hard to get good grades,' which are followed in order to fulfill a desire. In contrast, a categorical imperative represents a universal moral law that must be followed, regardless of one's desires or the consequences of the action.