A motion made preliminarily, at the start of a trial, is made:

A motion made preliminarily at the start of a trial is known as a motion in limine. This type of motion is typically filed to request that certain information or evidence be excluded from the trial before the evidence is presented to the jury. It is essential for ensuring that a trial is conducted fairly and that irrelevant or prejudicial information does not influence the jury's decision-making process.

Motions in limine can help manage the legal standards for evidence that might be contested and establish the parameters for what can be discussed or presented in court. The purpose of these motions is to streamline the trial process, reduce the potential for error, and protect the rights of the parties involved.

In contrast, the other terms listed refer to different concepts in legal terminology. For example, "in ambiguo" relates to situations where something is unclear or ambiguous, "in posse" references potential or hypothetical situations, and "in delicto" refers to wrongdoing or civil torts. None of these terms are relevant to the specific process of making preliminary motions at the start of a trial, which is why they are not the correct answer.