How are loads imposed on the structure defined?

The correct response highlights the classification of loads imposed on a structure by their nature. Loads can be categorized into different types, each with specific characteristics.

Dynamic loads refer to forces that change over time, such as wind or seismic activity, and they can create varying impacts on a structure as conditions change. Static loads, on the other hand, are forces that remain constant over time, such as the weight of the building materials and any stationary furnishings. Distributed loads are a specific type of static load where the weight is spread out over an area rather than concentrated at a single point.

However, the term "imposition load" is not standard terminology used in structural engineering literature or practices. Loads are typically defined by established terms such as dynamic, static, or distributed, which helps to clearly communicate the behavior of forces acting upon a structure. The correct terminology that corresponds to how loads are defined would be either static, dynamic, or distributed depending on their characteristics.