Biblioteca

The vertical warning sign indicates the proximity of a steep ascent, with a ten percent gradient. The graphic symbol is read from left to right, where the black ramp rises, indicating that the road will present a significant upward slope, which requires moderating speed to adapt the vehicle's progress to the necessary effort. The other options are incorrect because a descent, whether steep or dangerous, would be represented by a sign where the black ramp declines from left to right. As the symbol clearly indicates an upward trajectory, it is an ascent.