Ms. roberts asked tim to put the label "compound" on the correct jar in the picture. which of the four substances is a compound?
a) chlorine
b) nitrogen
c) sodium
d) water

Option D, Water

Explanation:

A compound is a basically composed of two or more different elements. Of all the given options, Sodium is an individual element. Hence it is not a compound. Just like sodium, chlorine and Nitrogen are also individual elements. Therefore, both chlorine and nitrogen are also not compound but water is composed of two different elements - a) Oxygen and b) Hydrogen.  

Mixture of oxygen and hydrogen in the ratio of 1:2 respectively under suitable conditions produces water which is a mixture of more than one element.

Hence, Water is a compound.  

Option D is correct

cancer   is   essentially   uncontrolled   mitosis   of specialized cells

it's not c. i took the quiz and got it wrong. so my best guess is b.

have a great day, and hope this .