Final answer:
Gina adds a burst of brightness with a variety of colors to her tray, creating a vibrant effect. Hence the correct answer is option 3
Step-by-step explanation:
When it says that Gina adds an explosion of color to her tray, it means that she adds a burst of brightness with a variety of colors, creating a vibrant effect. This makes her tray visually appealing and lively.
Hence the correct answer is option 3