How do contour line show elevation, slope, and relief

Relief is the word used to show the lay of the land...the changes in elevation. Contour lines are connected lines that show elevation is the same at all ponts along that line. The closer together the lines are, then the steeper the slope will be.

That is true tge cactus as a structural adaptation to its envirinment has it leaves reduced to spines. but this doesnt mean it cant produce food it produces food because of the presence of chlorophyll in its stem

The answer is c i think