Answer :
I think you forgot to give the choices along with the question. I am answering the question based on my knowledge and research. Andre adds a spoonful of baking soda to a glass of vinegar. Bubbles begin to appear in the vinegar. The bubbles signal the formation of a compound. I hope the answer helped you.
The options attached to the question above are listed below:
A. element
B. atom
C. mixture
D. compound
ANSWER
The correct option is D.
A compound refers to a substance that is formed as a result of combining two or more element together. During the formation of a compound, chemical changes usually take place and the resulting compound always have properties that are different from those of the elements from which it was formed.