When water is placed in a thin glass tube, it tends to climb up the walls of the tube. this effect is known as capillary action. what causes this capillary action?

a. metallic bonding
b. covalent bonding
c. ionic bonding
d. hydrogen bonding

in cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. a contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes.

explanation:

i think it is true since you can test the answer and can use observations to complete it.