Answer:
Based on the information provided, the following items have been identified as social facts:
1. Greeting someone with a handshake: Greetings and social norms for greetings, such as handshakes, can be considered social facts. They are behaviors that are widely recognized and accepted within a specific society or culture.
2. Style of clothing that is in fashion: Fashion trends and styles can also be considered social facts. They reflect the collective preferences and choices of individuals within a society and can vary over time and across different cultures.
3. Freeways, bridges, and borders channel movement of the earth's inhabitants: Infrastructure elements like freeways, bridges, and borders are social facts as they are constructed and designed by societies to facilitate and regulate the movement of people within specific areas.
The following item does not qualify as a social fact based on the information provided:
- Wheat covers 870,000 square miles of the earth: This statement refers to a natural occurrence and does not involve social interactions or human behaviors, which are typically associated with social facts.
The item "people engaging in post mortem death photos" is not specifically mentioned in the provided information and cannot be confirmed as a social fact without additional context.
