Final answer:
Information not inherent in the movement or task and provided by an external source is known as external feedback or external information. It can affect performance and understanding in various settings, including the physics concept of external forces, and is differentiated into nonessential and essential information categories.
Step-by-step explanation:
Information not inherent in the movement or task and provided by an external source is typically referred to as external feedback or external information. This type of information can influence a person's performance on a task, as it provides additional data that is not obtained through the actual execution of the task itself. In the context of physics, an external force influences a system from outside, much like how external information can influence a person's understanding or performance.
Nonessential and essential information are two different categories often discussed in educational contexts. Nonessential information, while it may be interesting or add depth to knowledge, is not critical to the fundamental understanding of a concept. Essential information, on the other hand, is crucial for a complete understanding of a subject or task at hand.
In some cases, external sources of information can help shape the message, tone, and structure of a composition or understanding, particularly when it involves nonessential information that provides a broader context or enhances comprehension.