contestada

A)The water changed from blue to yellow when the student blew into it (step 2). Identify the compound that caused the water to change from blue to yellow.
B)Explain why the water turned blue again when the beaker with the waterweed was under the bright light (step 4). In your explanation, identify the process that caused this change.
C)Explain why there were bubbles on the waterweed leaves (step 4