Which of the following is an example of a compound? A. helium B. water C. hydrogen B. oxygen

the compound is B.

Water is a compound because it is made up of water molecules.

the answer is (B)water

Explanation:

for example,water is a compound of hydrogen and oxygen.each if it molecules contains two hydrogen atoms and oxygen atom

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: