Final answer:
The statement is best categorized as an opinion because it is based on personal interpretation of human nature and political diversity. It reflects the inevitability of political divisions due to inherent human differences and varying interests.
Step-by-step explanation:
The statement in question, "The causes of fractions are inherited in the nature of man, people are different therefore people have different political interests," can most appropriately be classified as an opinion. This is because it is an assessment based on personal views and interpretations of human nature and political diversity. While there is truth that humans inherently have differences which can lead to distinct political interests, stating that the causes of 'fractions'—presumably a misprinting of 'factions'—are inherited is a subjective viewpoint rather than a universally accepted fact.
Historical analysis and political theory have long noted that diverse opinions and interests are natural outcomes of human societies. People's opinions, such as on the value of equality, liberty, freedom, and privacy, are often influenced by a combination of cultural factors and personal experiences. These differing opinions and interests can create political divisions and factions, which are considered a normal aspect of democratic societies. They can lead to polarization and require thoughtful legislation and governance to balance, as not all interests may align with the common good.