Which feature do polarising filters provide to photographs?

Polarising filters are a vital tool in photography, especially for landscape photography, because they significantly impact how images are captured. One of the primary functions of a polarising filter is to darken skies, which enhances contrast and makes clouds stand out against a blue background, creating a more dramatic effect. Additionally, they help manage reflections off surfaces like water and glass, allowing for clearer visibility of elements both in reflections and beneath the surface.

By reducing glare and reflections, a polarising filter helps in achieving images with better clarity and depth, which is why it is favored for outdoor and nature photography. The filter accomplishes this by filtering out certain light waves, thereby producing a well-defined contrast that can make elements in the scene pop visually.

While the other options discuss aspects such as image sharpness, color brightness, and image softness, these features are not directly related to the primary benefits provided by polarising filters. Therefore, darkening the sky and managing reflections accurately represent the main advantages these filters offer to photographers.