Question

Consider the following characteristics of contour: (A) A uniform slope is indicated when contour lines are spaced uniformly
(B) Contour lines cannot go anywhere but can close on themselves
(C) A set of closed contours indicates a depression or a summit, according to the lower or higher values being respectively inward
(D) A contour is an imaginary line passing through the points of an equal level on the surface of earth
Choose the correct answer from the options given below:

• A. (A), (B) and (D) only
• B. (A), (B) and (C) only
• C. (A), (B), (C) and (D)
• D. (B), (C) and (D) only

Hint:

Contour lines provide vital information about the shape and elevation of the land's surface.

Answer 1

The Correct Option is C

Step 1: Analyzing Contour Line Properties.
- (A) Uniformly spaced contour lines signify a constant slope. This is accurate.
- (B) Contour lines can form closed loops. This is also accurate.
- (C) A series of closed contour lines depicts either a depression or a summit. In a depression, values decrease inward; in a summit, values increase inward. This statement is correct.
- (D) A contour line is defined as an imaginary line connecting points of equal elevation on the Earth's surface. This is the correct definition.

Step 2: Determining the Correct Option.
Since all four stated characteristics (A, B, C, and D) are accurate, option (3) is the correct choice.

Final Answer: [ \boxed{3. \, (A), (B), (C) \, \text{and} \, (D)} ]