<em>Bias by omission</em> refers to the exclusion of relevant information. In this case, removing mention of the British would be a bias of omission.
<em>Bias by source choice</em> happens when an author only looks at a certain type of source, especially when this type is likely to confirm the opinion of the author.
<em>Unintentional bias</em> occurs when the author's personal beliefs or ideology are unconsciously introduced in the text.
<em>Bias by arrangement</em> happens when a story is purposely designed to be more accessible to readers, therefore minimizing the impact of other stories. This happens when the media covers only one type of stories.
