An appropriate instruction should be:

An appropriate instruction should be brief and clear to facilitate understanding and execution. This approach helps to ensure that learners can easily grasp the expectations and the specific actions they need to take. Clear, concise instructions minimize the potential for confusion and allow students to focus more on the task at hand rather than deciphering overly complex language or lengthy explanations.

Moreover, succinct instructions are particularly beneficial in a learning environment, as they can engage learners more effectively and foster a positive learning experience. By using straightforward language, instructors cater to diverse learning needs and promote better retention of information.

In contrast, long and detailed instructions can overwhelm students, potentially leading to misunderstandings. Complicating instructions to challenge students may inadvertently create barriers to learning rather than providing constructive challenges. Finally, using a formal writing style might not resonate with all learners, as it can introduce unnecessary complexity and remove the personal touch that often aids in effective communication.