Final answer:
In Spanish, the preposition 'para' is correctly used to indicate deadlines, as in setting a due date for a task or project.
Step-by-step explanation:
The preposition 'para' in the Spanish language is used to indicate a variety of things, such as purpose, destination, or the recipient of an action. When it comes to deadlines, 'para' is indeed used to specify the time by which something is due or expected to be completed.
Therefore, the statement that 'para' is used to show deadlines is true. For example, if you have a project due on a certain date, in Spanish, you would say 'el proyecto es para el viernes', which translates to 'the project is for Friday', indicating the deadline.