What type of communication should be focused, factual, and free from bias?

Focusing on email and file notes as the correct answer highlights the importance of maintaining a professional standard in communication, especially in the context of being a field adjuster. These forms of communication require clarity and objectivity, allowing for precise reporting of findings, observations, and decisions made during the claims process.

Utilizing focused and factual communication through emails and file notes ensures that all necessary details are documented accurately and can be referenced later, which is crucial in the insurance industry where decisions might rely on the information provided in these communications. Remaining free from bias is vital as it promotes transparency and trustworthiness in the claims process, helping to avoid disputes and misunderstandings.

In contrast, personal opinions, social media posts, and informal discussions may introduce subjective viewpoints or emotional content which can cloud the critical assessments needed in claims handling. These avenues are less suitable for formal communication in a professional setting, as they do not typically adhere to the standard of objectivity that is necessary for effective field adjustment.