Concept:A ridge is a long, narrow, elevated strip of highland with a continuous crest and steep sides.
Explanation:The feature marked P appears as an elongated stretch of higher ground.
The contour lines around it run almost parallel to one another.
This pattern indicates a narrow, extended highland rather than a rounded isolated hill.
A knoll is a small, rounded hill, which does not match the elongated shape.
A valley is a low-lying area between hills, so it is not correct.
A mountain is usually a large, prominent peak with a broader base, not a narrow strip.
Therefore, the feature is best described as a ridge.
Answer:D. ridge