Which type of slope is characterized by a gradual incline?

A gradual incline in a slope is best described as a gentle slope. Gentle slopes are characterized by a smooth and gradual rise over distance, making them easier to traverse compared to steeper inclines. This kind of slope is often found in natural landscapes such as hills and gentle valleys, promoting easier movement for both people and vehicles.

Steep slopes, on the other hand, incline sharply and require more effort to ascend or descend. Concave slopes might curve inward and can vary in steepness but don't specifically denote gradual inclines. Convex slopes usually curve outward, offering a different profile that does not align with the description of a gentle incline. Therefore, gentle slopes stand out as the correct choice when identifying a type of slope characterized by a gradual ascent.